Modern games include assets with very large file sizes that operating systems do not.
Sure, the good old days where _all of this didn't work without specialized hardware that you bought with every single cartridge_. Mode 7 didn't come for free, it was an entire additional, single purpose chip in the cart on a console that didn't have any concept of task management or even OS. But hey, if you want to have to plug in and swap PCIE cards for each piece of software that you want to run, feel free to reinstall DOS.