they often don't leave the hotel at all,
I can't imagine a more boring holiday.
I've never understood that... mentality...
Me neither although I suppose if you are a family with kids it might work out to be cheaper.
foreign vacations with infants.... don't they have grandparents who would like to spend some time with them?
Maybe they don't have a choice but to take them. You're presuming that grandparents have retired and aren't still working. That might not be the case.