It's because creating more complex system requires more than a linear increase in development and then the development system has to also be more complex because it requires more people and communication between them gets harder. Everything grows exponentially.

I just think that fundamentally, the games we imagine and are promised that should be possible with the processing power we have today is just impossible to create because the systems are just too complex(costs too many hours of skilled labor, impossible to earn back).

AAA games mostly seem like prettier versions of games from late 200x's. Moment to moment everything is higher fidelity but the gameplay systems are just the same.

(I haven't played the game but mostly because Skyrim was also mostly boring to me because the gameplay systems were actually really shallow and I didn't care about the "wow big open world" anymore because its not a novelty anymore)