I agree with your points 1-3 but I don't think your conclusion in 4 follows logically. It misses important historical context of where passing laws did in fact create more equitable access to important civic resources. Take for instance the Civil Rights Act and the Americans with Disabilities Act. You could have made the same argument you are making now to dissuade people from passing those laws.
I definitely think laws can do what you say. But I think that's not always what happens. What I object to is really more specifically how the gist is "change the laws, its an easy fix". Anyone who spectates government (odd phrase, I know) will understand that this is very much not an easy fix.
