You're making the argument that Nintendo refreshes and tries to innovate within these franchises and producing more games by volume, I'm making the argument that it's not about how different this year's Mario game is from last year's Mario game, it's about me being tired of Mario games from Nintendo and wanting to see some new IP. Splatoon is right now the most recent name I can think of to come out of House Nintendo as a wholly original game IP. Before that I think the first new original name to come from them was Pikmin.
And I'm NOT the only person who thinks this way. Nintendo has said so themselves. Five years ago[1]. And we're still got a new device with the same familiar platform drop titles: Mario, Mario Kart and Zelda.
[1]https://www.nbcnews.com/technology/nintendo-admits-it-needs-...
At least Naughty Dog, the creators of Crash Bandicoot got out of their comfort zone and explored multiple different IP, despite Crash ostensibly being to the PS1 what Mario was to the N64, and Sonic the Hedgehog was to the Sega Dreamcast.