>>1748734This might shock you.. but usually humans have one partner, a special someone, and that's it. If you want more straight stuff without it being empty, you need more males. But you also don't want that, do you now.
It'd be easier for you to get over girls bonding with each other so you have more meaningful relationships. The problem is more that Sensei is an empty character. It'd be better if there was a meaningful relationship that Sensei had with one special girl. The entire thing would have more weight than an entirely female cast consisting of 100 girls all saying "I love you" to a faceless male MC. If everyone loves you, nobody loves you. It's supposed to be something special after all. You know, the only one and such.
They'll however never commit in a gacha. And doing girl on girl is just perfect for that. Nobody expects anything to ever happen with that to begin with. There's only a very small minority that gets incredibly angry when two girls talk to each other, but that's a small price to pay compared to when you'd add random males to talk to the girls instead, and it allows you to characterize sooo much better. Why do people like the BA girls so much? If they were all in a vacuum, none of them would be liked. It's the group dynamics.