Here you go:
The guy goes at length explaining how the Joy-Con's analog stick functions and why the drift is being caused, and then comes up with the most ridiculously simple solution. Basically you wanna put some cardboard inside the thing, gg. I suppose Nintendo will come up with a new use for Labo if they see this.
I don't know for sure if this is really gonna be a permanent fix for everybody, but it seems good.