SAN FRANCISCO — A stomach bug might have won the Warriors their second-round series against the Los Angeles Lakers.

It certainly highlighted the fundamental difference between these two teams and showed just how difficult it will be for the Lakers to take another lead, much less win it.

Typically both of these teams start two non-shooters.

But when Warriors center Kevon Looney came down ill two hours before Game 2, it forced coach Steve Kerr to drop him from the starting lineup. One non-shooter was out.

In came JaMychal Green at center. He is absolutely a shooter.

The result was total Lakers befuddlement, back-to-back 40-plus-point quarters for the Warriors, and a 27-point Golden State victory.

Yes, there were other adjustments the Warriors made: The ball was in Steph Curry’s hands more on offense. They drove to the basket more and seriously crashed the glass. The Warriors clogged the paint on defense, and they didn’t commit a dozen stupid fouls on the Lakers, either.

But the most significant adjustment — the critical adjustment — was that the Warriors, whether by fate or brilliant design, took a nonshooter off the floor.

“It was hard for us to guard four shooters,” Lakers forward Rui Hachimura said, as if the NBA isn’t a perimeter-first league these days.

The adjustment should be simple for LA: go like-for-like. Drop a non-shooter from the starting (and closing) lineup and play with someone else who can effectively space the floor.

The NBA in 2023, right? Well, the Lakers can’t do that.

While the Warriors’ nonshooters are Looney and Draymond Green, the Lakers’ two non-shooters are their two best players — Anthony Davis and LeBron James.

It puts them in a damned-if you-do, damned-if-you-don’t situation now that the Warriors have gone small.

Sure, Lakers coach Darwin Ham can stagger some of the 105 possessions (25 total minutes) Davis and LeBron played together in Game 2 (the Lakers were minus-19 during those spells), but there’s no chance one of the two is sitting on the bench in the big minutes of the game. The Lakers roster isn’t good enough to justify that.

Or the Lakers can continue to play two non-shooters, leaving the Warriors to let James (18 percent 3-point shooter in the postseason) and Davis (42 percent shooter from anywhere that isn’t under the basket) shoot to their hearts’ content.

The real adjustment the Lakers need to make is beyond the realm of basketball.

LeBron and Davis can work together if the Lakers are either able to magically turn LeBron into his 2012 vintage — that was a player who could run point, shoot effectively, and drive to the basket with consistency and impunity — or re-create Davis into a true, consistent alpha who wants to bang in the paint but can also knock down midrange shots.

Neither is going to happen. Davis wants to keep shooting. He still thinks he’s a wing.

“Same exact looks. Didn’t shoot no shot that I didn’t shoot in Game 1. Just missed them, that’s all,” Davis said Thursday.

Meanwhile, LeBron is doing his best work offensively on the block (the space where Davis is supposed to reside), but his average shot came from 16 feet away in Game 2. This, after missing 11 of his last 15 shots in Game 1.

It’s clear LeBron’s left foot injury is still an issue. He might as well have concrete in that shoe. He needs a Davis that can dictate a game. Tuesday was a perfect opportunity to do that.

But Davis is still such a beta he doesn’t do solo press conferences. That showed in his Game 2 performance, where Draymond Green, Looney, and even JaMychal Green pushed him around. He had 11 points and seven rebounds.

Looney, sick and clenching the whole 11 minutes he played, pulled down more rebounds than Davis, who played 33. (Heck, Looney had more rebounds than any Lakers player period tonight.)

We might get a flash of what the Lakers need for a game. We saw Davis hit shots in Game 1, after all. Perhaps LeBron will have his turn-back-the-clock performance in Game 3.

But the Lakers can’t win four games in this series with a strategy of one-offs.

There’s nothing flukey, however, with what the Warriors did in Game 2.

The space JaMychal Green brought to the starting lineup was a godsend for a team that consistently ran into itself on offense in Game 1. By having only one non-shooter on the floor on Tuesday, the Warriors forced the big, often-plodding Lakers defense to guard the entire 50-foot width of the court.

They couldn’t do it. James must feel like he’s back with the 2017 Cavs.

Remember, the Warriors ran their way to 53 3-point attempts — despite the Lakers playing top-locking defense to take away such shots — in Game 1.

The added space in Game 2 meant that of the roughly 35 3-pointers the Warriors took in the meaningful moments of the game, well more than half were uncontested, and easily a third were shot with no defender within yards.

So yes, the Warriors shot 50 percent from distance. But how could they not? They had shooters on the floor.

Expect that to remain the case until the Lakers show they can counter it.

And I don’t see that happening as the series shifts south.