So a Wii U game is peak performance for Switch? And because of that, 3rd parties will abandon the console? And because of that, people will stop buying a Switch?
He really had me convinced until you rephrased the statement like that.
Now it just sounds batshit crazy.
But in all seriousness, 3rd parties will have to do more than just mobile ports of their games if they want to gain any sort of traction within the Switch ecosystem. $50 Bomberman ports aren't quite going to cut it and I'm quite sure most developers are well aware of this.
I have my suspicions that games E distributed via the Nintendo Store may be the best bet for 3rd parties unless they develop something clever specifically for the Switch that takes advantage of what the platform has to offer in a way that can actually compete with Nintendo's own offerings.