I'm from Assetto Corsa, where there are a lots of mods.
More are bad sh*t, but there are also mods that are even far better than original stuff. Both cars and tracks.
Even now, I'm using Assetto Corsa to improve skills in real life Drifting. And not because AC physics is better than LFS, but simply because in AC I can build my own car and, more important, I can build the "tracks" where I can drive also in real life.

I think that in 2024, there is no reason to "lock" the contents of a PC simulator.

PS: actually, the ability to use mods is the reason why 90% of gamers use pc instead consolle.