Honestly @RadicalEagle said it better than I ever could...

I do believe a landlord should have the responsibility to communicate with their tenants personally, to negotiate any contracts personally, to hand notices personally, so that they're at the very least obligated to see their tenants as people rather than as purely as an investment.

Sure, there are some psychopaths that'll stomp all over you anyways, but for most people it's a lot harder to be an asshole when you have to confront the consequences personally.