I totally know what you're saying, but your two examples are anything but casual.
Of course, if what people are REALLY talking about in here is mostly story based adventure games with simple puzzles and a lot of character interaction, which both Night in the Woods and Hotel Dusk essentially are, then that's a genre that directly goes against most of the mantras that Miyamoto champions. Not saying they won't do it, but it hasn't ever really happened in-house. Cing was the only dev in the genre they ever really published for, and they're gone now. :/
Miyamoto doesn't run Nintendo's in-house development anymore, Shinya Takahashi does. Takahashi came from SPD, which specialized in working with developers like Cing with these kinds of games. SPD and EAD merged in 2015 to form Nintendo EPD, so we could see more games like that come from Nintendo's in-house teams.
Takahashi tends to be more of a risk taker than Miyamoto, willing to green-light titles that have no mass market appeal, but do help diversify the library, whereas Miyamoto was always about appealing to the widest audience.