The advantage is you can play these anywhere while on switch so i fail to see how it's the worst way. It's a convenient way for people to play them that might no longer have their original hardware anymore.
nearly all games had technical issues, some were fixed but usually they are still worse than using Ares or other emulators.
one of the more recent releases, Perfect Dark, has graphical glitches, sub par audio, input lag and issues with the analog inputs for example.
this is why it's a bad way to play them. Nintendo can't match fan made emulators in most of these.
These were nintendo games it's a no brainer to release them onto the nintendo ecosystem where it has the largest userbase & that userbase enjoys games of this type.
it's a nobrainer, sure, but that doesn't mean it's a good way to play them.
If we are going on about the correct way to play then that would be on N64, the games were designed for that pad specifically something that the switch actually has officially if you want it.
a Bluetooth controller. I wonder which system out there also support Bluetooth controllers and has fans making the controller compatible