I feel the same way, Yonuh, about having strangers staying in my home. It might be different if one's home is set up for guests, but ours isn't. When we go away for long stretches of time, we have a house-sitter stay here, and that's difficult enough for me...I'd be too stressed out about total strangers snooping through our stuff. We'd have to drastically change our lifestyle in order to be able to put our house in the care of strangers like that.
Having said that, I'd actually probably enjoy staying in someone else's home for a vacation...but that's assuming that people who do put their houses on the market for vacationers have their homes set up for it.
When you don't like a thing, change it.
If you can't change it, change the way you think about it.