Government doesn't have unlimited power to alter reality, there are countless examples of legislation being ineffective or having unintended consequences. The canonical example is prohibition of various drugs, but more recently the "ban the box" initiative is quite illustrative:
> "I told her about my conviction, and she wanted me to go deeper into what happened,” he told me, describing one interview in particular. “When I explained that I shot somebody in the back of the head, she didn’t want anything to do with me anymore."
... And then they never go into that more. Why is that not an acceptable reason to not hire someone?
https://www.theatlantic.com/business/archive/2016/08/consequ...