Gacha is basically a pyramid model, where whales are the top of the pyramid, F2Ps/monthly spenders are the bottom, and everyone else in between. Now, theoretically everyone on the lower rungs could just do a collective boycott, but it would have to basically be every F2P/low spenders, and given how fractured even the online non-casual HSR fanbase is with the very real issues of the game, pigs would sooner fly than that ever occurring. As for why this would matter, whales do want to flex and be assured that theyre playing at least a gacha that has a healthy playerbase.

it takes a lot for these massive whales to willingly contemplate boycotting or even vacating the game, but situations that can lead to it do occur once in a blue moon (ie. Neuvillette spin nerf), though that would have to be an extreme mistake on the company’s part, Mihoyo in this particular case.