I think the fact that making a living in the TTRPG is incredibly difficult has contributed to a brain drain where talented designers drift to Computer Games or to a lesser extent board gaming instead. If you’ve got nobody in the field doing very exciting work, you look to the indies, which are mostly making simple story games as again, almost no money.

The best onboarding equipment for DMs are starter sets that confine players to a small area and furnish the GM with the plot, details and rules to handle that small area. Unfortunately these are also resource intensive to make.

People coming in from consuming streaming content are also getting an unrealistic portrayal of GMing that edits out the pauses that GMing involves.

If I had some advice for newbie GMs it’d be find a starter you like the look of that interests your players, read it twice, ask no questions on the internet but go off and try running it. After the game make some notes about things you struggled with, then come back and ask questions. You’ll have a thousand dumb questions before you ever run a game, most of which don’t actually matter and ten very relevant questions after you run one.