The sightseeing log as a whole could easily be called "an optional fun bit", since it doesn't really have a functional purpose, but you make a good case for making jumping puzzles separate from the sightseeing log.
The sightseeing log is typically just about exploration, so these unusually difficult platforming bits are probably unpleasant or out of reach for many players who like the rest of the sightseeing log, while the rest of the sightseeing log would be of little interest to players who like the jumping puzzles specifically. Though, I don't think the jumping puzzles themselves should be removed/made as easy as Leap of Faith/omitted from all future zones, nor do I think there should be no reward for completing them. The sightseeing log entry associated with each jumping puzzle could easily be replaced with an achievement specific to that puzzle, maybe with a small reward like a minion or a title if you complete all of the jumping puzzles.
There's a balance to these things. An MMO can't be designed for only one type of player, because games like this try to appeal to a wide audience. Pick any random player, and you'll almost certainly be able to find something in the game that they find too unpleasant, too difficult, or too time-consuming to complete...and yet, that player's favorite activity is probably someone else's impossible task. Considering that, if these jumping puzzles really are one of the only things you're unable to complete, you're not "less than other players in the eyes of the game". Rather, the jumping puzzles might be one of the few things bringing you down to everyone else's level...