I think he's just saying that cause he probably had a bad reaction/didn't like opiates when he tried em. Over the course of the years I've met several people who either LOVE opiates or HATE them. I have friends who puke every time they use opiates and another friend who found the high underwhelming(maybe cause he was a crack addict and expected a more mind-blowing effect from it). The opiate buzz is a very subtle one compared to cocaine, meth or uppers in general.
My first few tries with opiates were horrible, but I’m no quitter I kept at it til I learned to absolutely “love” them

-GC