I'm in the same boat. Every time I have had to use curl over the past ~15 years I've had to look up how to do the few basic things I need to do. With HTTPie, its easy enough that I haven't needed to look anything up after the first two or three times.

Sure, cURL can do it and if I used it frequently enough, I guess I'd remember how to use it without having to look it up every time, but for my basic and infrequent use, HTTPie is more pleasant to me and I can remember how to use it.