The real issue is that your conception of "pro" is off. The "pro" users Apple traditionally targeted were not software developers. Their laptops became popular

The real issue is that your conception of "pro" is off. The "pro" users Apple traditionally targeted were not software developers. Their laptops became popular among developers not because of the hardware, but because of a quirk of Apple's corporate history which led to OS X being a Unix under the hood, which in turn meant it was a computer you could do all your developer-y things on without the living hell of trying to run Linux as your desktop OS.