In all fairness though, ERZ2 is something of a beginner's trap - the Castle Eggman example, at the very least, featured brighter-coloured raised ground as buttons fro triggering the trap. ERZ2, on the other hand, traps you when you touch the ground in a specific sector and there's no way of telling in advance that it does so - I didn't even know it was skippable until I saw a bunch of people jump over it in a netgame.
But yeah, more to the topic at hand. It depends more on how you execute the gimmick - it just so happens that there's more bad ways of doing it than there are good ways, so you statistically have a greater chance of screwing up if you don't know what you're doing.