That's my point; portability is not the be-all end-all. There are other factors, like games. Switch is not selling as well as it is in Japan simply because it is portable, if that was the case Vita would've outsold the PS4. Switch is also selling as well as it is off the back of powerful system-selling software. To pretend its resounding success is solely due to portability is simply ignoring reality.
Portable is the biggest factor so i see nothing wrong with people saying japan is portable crazy. Vita sold over 6 million without any 1st party and 3rd party AAA games because it is portable