You are reading stuffs. People have seen this. If they were uneasy at this sight, they must have felt/observed something more than that, so much so that they thought that these girls might not have been there by choice.
People do get suspicious of fishy people and if you ask them why they are suspicious of some people, they would say, "he was behaving a bit different, something was off about him". And people like you will dismiss it.
Even in real life, I see people walking around with girls. Most of the times I feel or suspect nothing but sometimes I do feel something is off or fishy about it but yet I can't describe it fully.
Now you know a lot more about Epstein, what do you think why he brought "2 models (possibly quite young, given the reputation of Epstein) who are possibly from eastern europe" in MIT lab?
Now we know a lot more about Epstein, people must have felt something much more about those 2 girls which you can't imagine.
Personally, I feel like you are arguing for the sake of arguing. I was shocked at your line of thinking.