Most businesses are increasingly using one of a handful of different POS systems (square, toasttab and clover).
I imagine the tipping options are set up by default on those systems and it requires a (probably already very busy, maybe non tech savvy) manager to manually go in and find the options to change or disable.
The workers are probably NOT happy about the extra tips going away.
Nobody really wins no matter what here. I guess I blame the new crop of POS POS vendors? IDK