They could, but they won't. Nintendo has a history of doing the IP stickler thing rather than the rational, money-making thing. See their approach to YouTube:
I really fail to understand how these big Japanese companies work.
It's like Toyota with electric cars, they could have become a leader in EVs as they had the bulk of the hybrid market (and thus experience), but they kept insisting that hydrogen was the way to go despite actual hydrogen car sales being abysmal and EV (read: Tesla) sales exploding.
I mean, this is a pretty straightforward issue. porting takes money and labor, and Nintendo's labor is limited. You can suggest outsourcing to 3rd parties, but a bad 3rd party port is worse than no port. Some companies don't care (see: Sega and honestly most Japanese companies until Capcom c. 2016 or so), but Nintendo has generally always had a high bar of quality with the titles they publish, and especially IP's they own.
It's not even a Japanese issue. Every company has this issue, but Nintendo is the oldest game developer. So they get the most flack
BEVs are not a sustainable idea. There will come a day when nearly all carmakers will have to shift over to producing hydrogen cars. It is Tesla, not Toyota that faces the disruptive threat.
