There's a whole thread of people disagreeing with this rather uncontroversial perspective.Has there been pushback?
I often disagree with your positions, but on this one -The best way to learn how to DM is to just start doing it - absolutely.
So it's not just me?? Been DMing since (gods!) 1977 and still beat myself up after my last session over something trivial I could have done better.I've been DMing for longer than I care to remember and I still get imposter syndrome whenever I DM.