There are many more international students attending US colleges including small LACs currently than back when I was an undergrad.
Thus, more of a reason why closing dorms for Thanksgiving would be very unwise if their aim is to take their needs into account.
In fact, I’ve only heard of a handful of colleges/universities which did that.
Maybe it was more common back when you attended college back in the '70s when international student populations were even smaller than they were when I attended or moreso nowadays.