An Airbnb or Kinkbnb would suffice for that use case. I don't need a kitchen with two ovens for most of the year but when I'm hosting a large party, having the option of a kitchen of that grade is nice.
Different people have different incentive structures. Owning or having access to private property is highly appealing. Its more economical and convenient to buy than rent for some things, and until prices and transactional friction decrease this will not change.
You keep missing the point. People don’t go to visit a conference center but _me_. Yes I can go to an event but when it’s done to do private stuff (going to events for themselves is quite different) it really is just a substitute.
And you’re exaggerating the cost too. Two ovens? Seriously have you seen a Polish Christmas dinner? Dozen people, dozen meals, one stove/oven combo. It’s normal stuff done by normal people with small flats.