The whole point of smaller CPU process sizes is power efficiency. You're making very strange arguments that aren't based in the reality of computing and processor design.
Obviously the PS4 is more powerful. It has a GPU that has more raw power than the switch, and there's little reason to argue that point.
Arguing that it's just a tablet makes no sense. It's a gaming device. It has been designed around that purpose. If you were to re-purpose the chips in an ipad and build tools that allow access to the bare metal and remove all of the iOS overhead I'm sure it would be a competitive mobile gaming device.
So then why are all mobile games designed around a simpler visual aesthetic? They simply don't have the available memory and storage in all available configurations to guarantee that it would hit the widest audience. If the iPad came with physical controls, a way to take in game media, and a certain level of in built storage to make sure that most games would be able to be stored, you'd see a lot more games that would rival the PS4 in terms of presentation. It's not just the chips, it's the entire package. What makes the Switch competitive is not just that it has a powerful tegra SoC, it's the joycon, the screen capability, the internal storage and RAM available to games, Nvidia developed dev tools built to make gaming software, the ability to dock and upclock. You can build a PC with about the same graphical capability available to developers (after OS overhead) and it would run pretty much any game today available on PC at some level. It's not just the chips it's how they're packaged and what play styles it offers the customer.