Ok let's discuss the economically depressed & partially repressed market because I think you can tell it's the core issue here.
The big problem you're not acknowledging is the extreme power of privilege.
This economic power (really the wrong word)
Influence is bestowed on any business how? Through consent of their patrons who choose to spend their money there. It really is a type of voting system.
You can't trust them to do right - just ask anyone who's ever worked for a big corporation. Those mofos are downright evil.
You can. Following Katrina Walmart mobilized a massive fleet of trucks with relief supplies to help the troubled area, to sell and donate. They were turned back by the military. (oh and let's leave the Walmart hating to an other time.)
Businesses won't magically pop up to serve under-served markets. Otherwise there'd be tons of business in economically depressed or high-crime areas where there's lots of need for grocery stores and clothing stores and such, which would then theoretically improve the area.
Doesn't happen.
You're right, ask yourself: Why?
Allowing discrimination like this is allowing people (who run businesses) to turn non-straight, non-white, non-Christian people into second-class citizens with government blessing. It's flat out wrong and it's anti-American in every facet.
No that's not why, There are entrepreneurs in those area's, only their activities are hampered by regulation because they need "food handlers permits" to open a taco stand. FDA inspections to sell produce. FCC accreditation to start a phone company. Gets raided by the ATF by making a tasty spirit. This reduces the available businesses centralizing the already established pool of market influence. This causes scarcity, and then legislators hamper them out of "necessity". You can't sell this on your property. Because it serves "the public". You can't say this on your property. Because it serves "the public".
They are only doing all that in
your best interest you know...
Edit: Typo