Is there no way to unlock these same things through grinding/playing the game? Most of these gachas incorporate both paid and free currency, just the latter taking longer to accumulate. I don't mind if some people want to spend money as long as unlockables aren't blocked altogether. Not really interested in paying a sub that I'll likely forget to cancel when I get bored of the game.
You should care because it actively promotes making games a chore to play.