Because the best product should still take care of some social accountability, Meta would not sell their shitty glasses without the light indicator and even with it, as it's trivial to hack there's large social pushback.
Just because you want to ignore it doesn't mean it's not there.
Society then decides on what morals we want to uphold, or at least tolerate, vs. those we want to change.
Laws are hard power to change behavior. Influence/goodwill/etc. are soft power ways to change behavior and bend organizations in ways they may not otherwise want to.
Would you pay a pto keep grandma from eating dogfood if it wasn't the law that you have to put a portion of your earnings into Medicare and Social Security?