Yes, there's only one problem I see with this strategy, putting all your eggs in one basket.
If they ever have a failed system again it's going to be a disaster.
With the WiiU they had the 3DS to prop them up for a few years, but the recent financial report revealed that the Switch accounts for 96% of Nintendo's Revenue... 96% of revenue from a single product! Imagine where Nintendo would be now if the Switch didn't take off.
If they have a single system strategy and release a system that bombs, they're screwed.
So they just need to make sure that doesn't happen and they're golden. Other than that one concern hybrid is clearly the way to go for them.