From my perspective it does not worth the speedruns or the 1 life achievements.
But the Pantheon 5 achievement i think it is worth it. I did the same thing as you i played hollow knight a lot till a point than replayed it and on and on till 1 day that i sayd fk it i'm doing the 112% aaaaand the Pantheon 5 is put on HOLD indefinitely i think.
I may come back to it to do a speed run or steel soul, pantheon 5 I made one attempt at and that seems like it would be rough but doable with enough practice!
I originally played the game without help then this time was part of a livestream on Twitch/kick/Youtube where people were giving help here and there which was so much help. The game is so good though I just want to keep playing but have stopped for the moment to try out some other stuff.
The game is so good though I just want to keep playing
Let me introduce you to the world of Hollow Knight Randomizer. That's how I got 600h on record. Endless fun! I didn't even touch P5 for the longest time.