Well the minimum to make a real game should be what, 3 years?
A lone wolf would need how much, 5 years?
I'm a beginner. Started this year.
So to learn all that's needed to craft a game and make a polished one, being extreme optimistic, 2027 would be the minimum. Just to make a first game.
Between the line, gathering info of Godot from people talking about it and extrapolating as possible users, I think most of real games are on the baking process. They will take a couple of years still (extrapolating mind you).
Most in Godot, I believe, are beginner. And those whom aren't must be in low profile doing their stuff.
It's very difficult craft a game.
So I believe it's more a matter of when and not why.
Even Godot Engine is developing faster recently, getting more financial support.
We'll need to wait a little longer to more of us have enough time.
Godot 4 is just around the corner so, learn it again, port projects, sort out bugs.
It will take time.