That's not how it works. Phones hold different thread priorities and have significantly different loads.
People develop on phones using development tools, like Swift. Switch supports UE4, Unity, etc, just like PS4 and X1. Specs don't really matter as long as the hardware supports the development tools. That's what everyone keeps neglecting to understand, mostly because they see numbers (that they also don't understand) and just make dumb assumptions.
By your comparison, it's disappointing at how terrible the PS4 Pro is compared to a medium specced PC.