I will trust what I saw more than what you said, I don't want any fruit or veg that's been in contact with black market fentanyl, any amount of some bootleg toxin could be much weaker or much stronger than what was described in your decades old textbook learning, hell it could be a highly concentrated form or precursor component/mixture, ect..... hell maybe some smugglers have liquefied and injected said bootleg fentanyl into some fruit to be extracted/recovered later.
Fact is we are talking about many an unknown factor here, you go ahead and risk your own life eating some fruit that's been in contact with black market fentanyl if you think it's always going to be perfectly safe, but don't go telling people that it can't hurt them, because you can't know all the factors in every possible situation, to think/pretend you do is idiotically conceited.