That reason isn't consistent with popular ideology. If it was valid, you could also make the same argument for AirBNB banning gays and say "well, gays can make their own GayBNB if they want. Let the market decide!" No. That wouldn't be fair for gays to be sidelined to the necessarily inferior minority service. Most customers won't use the GayBNB as a political gesture. Just as most Uber users didn't really switch to Lyft when they were angry at Uber because, well, they kind of liked the cheap and available rides.