Lets talk about this.
Take Witcher 3's world, Make 11 different playable characters with their own unique play styles (Swords, guns, fists, spears, fangs, etc), throw in dozens of spells instead of a handful, throw in dozens of summons (look up Ramuh FFXV if you want to know what a summon is) dozens more support materia. Instead of 1 mini game there are a dozen or so, now imagine every town/city is completely different from everything else in the game.
Imagine telling CDprojectred to make a city like Midgar in the Witcher 3, they cant reuse any assets from the rest of the game because its completely different, now do it again for Junon, and against for Cosmo Canyon, and again for the Crater, etc etc. There is a huge variety in locations for this game.
This project is an absolutely massive undertaking, thats why they never did it 10 years ago when people were begging them for it.
There is no company on the planet that would sell this game for 60 dollars, they sell dramatically smaller games for 60 dollars and those games reuse mechanics/assets from previous games and are subsidized by paid DLC and microtransactions.