Why do people think that Nintendo could go or should go third-party?

[KungKras]

Davman said:
Most people just want to play all games without needing to buy two consoles, so it seems cool to buy a console with solid third party support like playstation and play all the nintendo games in the same time.

Another solution would be to make the third parties come to Nintendo, and then you'd have third party games and Nintendo games on one system as well.