Gotta agree with this, especially regarding plot fatigue. If there is a very obvious goal things can get old quick unless there are numerous twists or interesting story devices. The key benefits of Numenera as a game seems to weigh around infinite creative possibility, so why fight that by restricting it with too much plot? Overreliance on plots can also be pretty dicey if the players find a way to squirrel their way too far from your guidance.

Not to condemn plots altogether though. It is nice to have at least some driving motivation to move things forward in some manner. However if you flesh out your worldbuilding enough a lot of interesting things can happen without them holding your hand excessively.