and how gacha games are attachment simulator... that doesn't sound right. i mean gacha games are games where you get attached to specific characters (or objects, or equipments, but it's almost always characters, in a way that even objects are characters. There will be a dedicated section for this). Gacha games are about pouring love to specific characters instead of the whole. Synergy between units, yes, but also you love this one so much, you will synergize the team for them.
And sometimes what you love isn't what you expected. Sometimes what you get isn't what you love but you ended up loving what you get anyway.
And even if you use a unit for the utility, you will learn to love them anyway. Get attached them because of the utility. Attachment is still attachment.
YES you can trace the line between old ADV games/dating sims and gacha games. Why do you think these are so popular with women?? Men wish they can be as genuine as women on this matter.