They essentially want a low-effort low-cost perpetual money-printing machine
Problem is that they can't micromanage that into existence, ConcernedApe more or less created a money printing machine with Stardew Valley all by himself, at least at first. It would be so much cheaper for studios to find like 15 inspired independent devs/designers that need money to make their dream a reality, give them just a lil equity and room/time to cook and they might actually get something amazing. But ain't no way execs and shareholders would let that happen, they'd yank the plug after year one of a three year contract.
Same for me, beat the full game once, now I only advance the plot to get better guns, put on an audio book and run around doing hunting challenges