If you're running a business, you most likely need to meet people where they are at. Sometimes, your target audience are mostly on Facebook, then you most likely need to be at Facebook in order to reach them. Sometimes they are on Twitter, then you need to be there. Other times, you're doing something completely different, like running a restaurant, then you need to be visible on Google Maps/Tripadvisor, otherwise you'll lose out on ton of business.
It's really hard to just start a business without having any place for finding users for it, and sometimes the best place is Twitter but you're shit out of luck if you get banned...