And the length of games plays big part too - my wife took 100h to complete Assassin’s Creed Valhalla and there’s still tonnes to do, it just meant that she wasn’t ready to buy another big AAA game for like 3-4 months.
What's the criteria for "AAA"? 100+ AAA releases per year seems a bit on the high side.
However, I think they did try to account for things like that: they started with an estimate games should cost $225-$300 before accounting for larger audience size.
Larger market size and efficiencies like reusable game engines are balanced by increased productions costs. The first versions of Final Fantasy just had text captions in 2D. Now they are in full 3D with fully acted voice actors.
Starts here: https://youtu.be/VhWGQCzAtl8?t=96
because it's a bad video made by someone who understands nothing about economics.