Part of it is: people believe there is an "Epstein client list", but that's never been found, and it's doubtful whether there would be a single document.
Likewise, the emails show who he was in contact with. There's no easy way of disaggregating those who were involved in his criminal activities from those who weren't. Very few people are dumb enough to put anything directly incriminating in an email.
The people who have been tripped up are the likes of Andrew and Fergie, who were dumb enough to say "I cut off contact with him in year x" and then it appears they were still in contact with him years later, and then they get caught in a lie.
Even if you take his long term friendship with Woody Allen, you might draw conclusions based on Woody's sketchy private life, but the thousands of emails between them are really just the two of them exchanging jokes and saying "thanks for dinner last night".
I think it's very likely that Epstein (NYC, Jewish, grew up in the 1970s) was genuinely a huge Woody Allen fan, had seen Annie Hall dozens of times, and was thrilled to strike up a friendship with his idol. And it's quite plausible that the elderly Woody, who has been completely cancelled, was unwilling to cut off contact with his shady friend who was one of the few people who didn't turn against him.
That's not to say it's impossible that there was more to their relationship, but I'm not seeing it in the emails.
It's massively more of a stretch to deduce anything from emails to/from a publicist about attending a Harry Potter premiere.