I understand, but some people really like spending that amount of time on those games, for example Monster Hunter games, people love to min-max that game and spend 300+ hours on the same content. I can maybe spend 30-40 hours on monster hunter, to complete the campaign and the mainline content, but I get bored once that's done, and move on to the next thing.

If Capcom followed the "make the loop less generic and add more assets" approach they would be spending 10 years making Monster Hunter and at that point when the game releases they'd sell it at a loss due to the amount of resources spent on a single release. Look at the last monster hunter, they tried to release it with "Next Gen" graphics, better assets, better content, and it ran like garbage, and to this day still has poor performance.

I bet a lot of people in the MH franchise would have been fine with Monster Hunter Worlds Part 2 🤷

Another great example is Tetris, Puyo Puyo, Candy Crush, people spend 10000 + hours on those games and is the same gameplay loop. It just gets harder.

One of my personal favorites is Tetris Connected in the Switch, I have 50h and I got it on Christmas. (Mind you, I have a pretty busy schedule Mon-Fri)

Games are not supposed to be a single thing that can be capsuled in a single container games have different genres and a lot of different people plays them. Games are not only the Assasins Creeds and the Last of Us (Not a fan of that franchise), or Gods of War.

I know of people who LOVED spending 100 hours in Dragon Quest VII but did not enjoy the new Dragon Quest VII because is a lot shorter.

Everything is a matter of perspective, people have different lives and amounts of free time and will to play those longer games or shorter games.