I think I agree with this - most normal people would be charmed/not alarmed by these people and you are naïve to believe you would have seen through it. Look at Jimmy Saville, there was always something very 'off' about him, but a lot of people didnt realise that he was a danger. I guess royals are the same.
Even my Mum used to have one on her team, when he was arrested as part of a ring, we were all shocked. He didnt fit the 'profile'.
I wouldnt pay too much mind to royals mixing with Saville/Epstein, most of celebrity society did.