My current operating theory on why jumping puzzles have proliferated modern MMOs is thus:
In every studio there’s one developer who is both the sole bully and the sole proponent of jumping puzzles. Call him the Biff. And everyone is terrified of standing up to the Biff, even though everyone else thinks that jumping puzzles have no place in these types of games and are often annoying and alienating to non-twitchy players.
So the Biff gets away with shoehorning them into the game while the studio is forced to pretend as if jumping puzzles are good ideas, because not even the execs want to stand up to the Biff. The Biff gave the CFO a wedgie in the bathroom that one time and called the lead producer a “butthead.”
Therefore, taking a stand against jumping puzzles is really standing against the tyranny of a bully who thinks it’s funny to make you fall down and go splat in a video game. Arise my fellow gamers and tell the Biffs of the world “no more!”