My problem with the handheld ones is that they’re way way too effective. He was good at science but that tech was way way beyond realism. It’s nigh-unbreakable, ultra-accurate and insanely grippy, almost inexhaustible in a single tiny canister. And somehow he can afford to regularly create batches on his limited income. Etc etc.

I mean, having the biological webbing come out of his hands isn’t a whole lot less realistic than the wall crawling or spidey sense. And he’s got weird powers from radioactive spider bite, who says they have to manifest in any specific way.