If we let the door open it will end up being used for profit and we know it.

Better to either get ahead and file several suits against the companies for discrimination based off of sex/gender/race/ early to scare them away, because if that doesnt work we'd have to start burning down their corporate headquarters. Which sounds a bit extreme.

Imagine having been forced to submit several minute long videos of you posted to online forums that will never go away at 16 until 70. Every mistake / strange life choice preserved and used against you. "Don't apply there, is what people would say at first, its your choice, your not forced to work for them" yet the number of companies asking would slowly increase and the job pools would slowly become smaller and smaller where it wasnt required until it became standard.

If we think customer facing jobs already discriminate based upon attractiveness, that would grow by a lot, and even the companies not trying to would subconsciously do it.