Garbage isn't limited to evolve/mutation/etc units, and no I wouldn't be crying because I'm fully aware of how gacha works in these games. I've drawn enough from FKG using a months worth of flower gems to get nothing but 3 and 4 star units I would never use that's no better than me giving away inventory space.
And buddy gacha has been implemented for those who've been logging in consecutively, seeing as how that's the only way to get buddy points aside from paying.