Because all pro customers work in advertising, graphics or why? A writer for example with a focus on text input is only a pro when he has a dedicated graphics card in the computer?
A pro can be anybody who makes a living using the computer as a tool, in my opinion. There is no set definition, you only repeat what works for you and make that a generalisation.
You seem to be confused. First of all you have to make distinction between regular people and people who excel in a certain area of expertise. Those people can be looked upon as professionals.
Now a professional can make use of any tool, but some tools are better than others and some tools enable professionals to do the work much faster and efficiently.
In a case of writer I don't think a computer is a requirement and since his area of expertise has nothing to do with performance of the computers available to buy today it's a bad example to use.
"Pro" label implies that device has better performance and makes use of technologies that ordinary users have no use of. For example a professional chainsaw has a more powerful engine and a longer chain as well as longer operational time amongst other things.
Old Mac Pro is a good example of what Pro computer is. Multiple storage bays, multiple CPUs, Multiple GPUs, more RAM slots, hardware raid, etc. -> that ensures higher performance. No-one would care too much that it's a bit bigger.
[doublepost=1483976568][/doublepost]
I couldn't care less about iPads. I'm talking about laptops.I use car analogies but they don't fit here. A professional artist who chooses to use an iPad Pro for his or her work who says they are using "pro" equipment(iPad Pro) is to be challenged they don't have the right definition of pro?