Until you are a landlord, you can't really say for sure what you'd do as a landlord. I just recently started renting out my house. Going into it I was all "as long as they pay the rent on time and don't trash the place, I don't really care who rents it". But then I started getting into the fine points of liability and eviction rights and all the icky stuff you never see as a renter. And then I started showing the place to prospective tenants and started to realize how critical it is for me to choose the right people to live in my house. After doing all that, I would really hate to see the tenant let someone I know nothing about rent the place. And so the lease states they can not. The wholesaler -> customer relationship is not the same as landlord -> renter.