This strat is banned form the speedrun leaderboard, so the actual WR is still 2:23 (also completely insane). The fact that this is completely working as intended just shows that this game absolutely nails destroying reality with complex magic.
I definitely feel like it’s interesting. But it kind of ignores much of the point of speed running if it requires either a mod or the results of previous runs to accomplish without accounting for that.
It would be like calling a video of the last few frames before hitting the final axe of Super Mario Bros representative of an entire run.
The 2 seconds is a valid part of a complete run.
I’d say it all depends on the rules he community of each game agrees on. For Noita this is not a legit run and that is fine, but using data from different runs/saves to make another run faster is not that unusual I think. Pretty sure some jRPGs do similar things for rng manipulation and Kotor2 and Skyrim have useful glitches that appear when you leave the game running for a while before starting your run. They are not allowed, but for skyrim at least the reasoning is not that it is an invalid strat, but that the setup is too much of a pain.