I have dropped all sugar a couple times. It’s not easy, but also not terribly hard for me. That’s not to say that is the case for everyone, just me. I have seen people come out of addiction to a few different drugs and it was not at all comparable. To compare my experiences with sugar would be as insulting as OP describes, if not more so.
But humans are all different, so I wouldn’t be shocked if for some it is comparable.