Mechanical sympathy. Rather than designing a game on a PC to take arbitrary advantage of modern tech and then trying to cram it down onto a more limited console platform, Nintendo ask, at design time, what the most interesting things they can do are that would work perfectly within the constraints of the platform — and then do that.

(And Nintendo engineers can have perfect knowledge of "the constraints of the platform", because 1. they built the platform; 2. it's the only platform they ever code for, never porting to anything else; and 3. for late-in-generation titles, they have been developing for it for years already, while also doing platform-SDK support for every third-party development studio.)

Oh, and besides that, because they design each platform initially specifically to work well for the types of games they want to make. (This goes all the way back to the Famicom, which has hardware PPU registers that were specifically implemented clearly to make the launch-title port of Donkey Kong extremely easy to code.)