We have a current high school junior and were planning to visit 5 or 6 universities during the 2 week spring break (this is the first week). Needless to say, all visits were cancelled by the schools within the last 10 days or so.
But to answer the OP, yes I think we would send our kid to a university without having visited officially. I hope it doesn’t come to that, though.
ETA: Just realized that OP posted in the prep school forum, although was asking about colleges. Oops.