I half agree, but I've been to a few of these things and it's all somewhat debatable because you're not really supposed to touch, or there are millions of people and you can't just sit and enjoy, or you don't know enough about them to understand deeply what you are seeing.
Ruined cities really don't look or feel anything like what they were. You miss an incredible amount by not being able to see them as the inhabitants would have. On the other hand you see the countryside and when that hasn't changed (e.g. the sea moving out) you get a feeling of context but .... even that is odd when the original people that lived there are long gone and a totally different culture has supplanted them. You smell the smells of the plants at least and that's good.
OTOH I can imagine the virtual part of this becoming incredibly good - with smell and touch even. Imagine lying in your Roman house in Pompeii and eating dinner while reclining. Listening to the street noise outside while enjoying the garden in your courtyard? I can imagine putting yourself inside the historical context to a degree that would require an extreme feat of imagination in the real place.
With paintings it's just the crowd, often being on your feet and the comical way in which one's favorite painting turns out to be tiny in real life and much worse than the print for that reason.