Sometimes indies use procedural generation as a shortcut to creating levels (or replayability) without consideration for these patterns, and instead of creating an engaging varied scenario they end up being obviously disjointed and break the flow of the player.
Procedural level generation is only viable in production for games if a professional level designer can step in and tweak it.
You can think of speedrunning a puzzle game as a racing/puzzle game though :)
(He also wrote extensively about it in his blog, as I recall, though I don't have a link handy.)
They handcrafted tiles, out of which a metroidvania style levels were generated.
It consisted of a random graph generation(with constraints), and fitting the handcrafted elements to that graph.
It took the best of both worlds - a properly designed levels with tons of replayability.
Are you saying that seeing the answer is more satisfying than solving the puzzle? (as in a joke or a magic trick that you don't even try to solve?)
Think an adventure game, where in order to proceed, you have to figure out the intention of the game designer for items and combinations (and pixel hunting). Compare that to the recent zelda game, where puzzles are more free-form - where you can employ physics to solve the problem at hand (such as crossing a cravice by falling a tree trunk across it).