No, it doesn't really bother me.
Yeah, it'd be nice if games like the Luigi's Mansion remake was on the Switch instead, just to see what it would look like in HD, but it's not something I'll lose sleep over, especially since I plan on buying the game anyway.
Plus, it's not like the Switch is being negatively affected by it. Out of the 36 minutes in this Direct, 5 minutes were spent on the 3DS, and the rest was spent on the Switch. So, it's crystal clear that Nintendo has their priorities straight. The Switch is head and shoulders, the main system now, but the 3DS is still profitable. Between hardware and software, they are still making a lot of money off of it and there is still a big install base there so it makes complete sense to take advantage of that and support it for as long as they can. They would be foolish not to.
Since I own both systems, it doesn't really make a difference to me in the long run, since it just means I have more games to play no matter what.
Pancho A. Ovies
Nintendo Switch in Japan (Famitsu): 2018 vs. 2019
PlayStation 4/Xbox One/Nintendo Switch: 2018 vs. 2019