Umm, surely you've heard of exchange students, right? Foreign student comes, stays with a family for a semester or school year.
Helps with the chores.We had exchange students in our school.
There's also sites for people who want to host foreign visitors.
https://justlikehome.com/become-a-host/
> Our homestay program is designed exclusively for our international visitors. Hosting international visitors is the best way to experience the world without leaving your home! Hosting provides families with the unique opportunity to share their cultures and learn about different cultures, all while being in the comfort of their own homes.
https://www.workaway.info/en/hosttype/family
> With Workaway you can find 14136 local hosts and families for volunteering around the world. Low cost immersive travel without having to pay expensive agency fees.
The entire idea of couchsurfing is that people will let strangers into their home.
https://en.wikipedia.org/wiki/CouchSurfing
> The idea arose after Fenton found a cheap flight from Boston to Iceland but did not have lodging. Fenton hacked into a database of the University of Iceland and randomly e-mailed 1,500 students asking for a homestay. He received between 50 and 100 offers and chose to stay at the home of an Icelandic rhythm and blues singer.
CouchSurfing is the real sharing economy, not the BS that Airbnb pushes.
Don't look only to your own feelings to deny what other people clearly do.