The wall glitch was for a specific level(s), as is every other intentional glitch, so there's no need to be disappointed as if every level had that glitch then some levels would be broken, like imagine falling out of the world via wall cliping.
If the glitch is limited to one level it feels authored. The levels should be designed in a way to take the wall clipping glitch into account.
Well you're making sense, but that would mean a whole game re-design..
