Doing this virtually is so hard. But I agree with @DoingOurBest – this phenomenon happens even without covid.
So much emphasis is placed on doing well in high school to get into college and the excitement of the acceptances that just getting in feels like the goal has been achieved. And the relief of having it over, too! While less the case this year, seniors are often really enjoying their status at school – they’ve learned the ropes, have friends and leadership roles, and the next step puts them back at the bottom of the heap.
With that said, deciding based on virtual visits feels so hard. I would just keep watering the "you will get to go there in person " seed.