Irrelevant, that is not how the categorized it. True Pro products tend to be more powerful, but it is not the power behind them as much as the dedicated hardware that moves the software. What good is it to have a powerful Pro class CPU, if the iGPU is crap?
Who determines what is a True Pro product and what isn't? Pro means professional. There are a lot of people who use their computer professionally who do not necessarily need gaming-class GPU performance. The Iris Pro chips do however have some advantages for certain "Pro" use cases, mostly in the fact that they have a gigantic L4 cache.
The whole "but I'm a real Pro and I need _____" just seems silly to me. I use my computers professionally. That involves mostly software development with a bit of 2D design work on occasion. What I need out of a laptop is a good screen, a good keyboard, a nice portable form factor, and a processor/GPU good enough to handle those tasks. Is that not Pro enough?