Please explain benefits of arbitrage to a dumb landlord....

[Bruce Woodruff]

After all these hundreds of posts about arbitrage, I just don't get it........so I have a question to ask. I have never actually done arbitrage from either side, so excuse my ignorance :-).

Here goes: Can anyone explain what the benefit is to a property owner to have a literal stranger sublet their house to a whole bunch of other strangers and pocket the difference in rent profit?