The issue with m*ales in gacha games is due to the nature of this "genre" (or more precisely monetization model). It's fine to have NPCs who are important to the story and all that stuff. But in gachas you have to PAY PER CHARACTER. So, of course, given the option to pay for a hot girl, who is for (You), and pay for a m*le, most players will choose the former. But then again, I don't get the complaints. Those banners are a perfect opportunity to save rolls. You don't want EVERY banner to feature a girl who's just your type, or you'll end up bankrupt very fast.