Never said anything about gear as high end as Hasselblad or medium format backs. The Nikon D5 and D810(a) both use compact flash (with SDXD also available on the 810), the same goes for the Canon 1D series, 5D series and 7D series (again, SD also, but CF is the better option). These are Pro cameras.
And we could debate whether or not your typical wedding photographer is a "professional". Certainly many are, but it seems like every new mom who spent too much on camera gear she doesn't know how to use to photograph her newborn is suddenly a wedding and/or portrait photographer (in full auto mode).
The truck driver example doesn't hold water because you don't see "every day" people daily driving a box truck around as an "enthusiast". They're a work truck, plain and simple.
So based on that a TRUE "Pro" laptop argument people are making it should have a CF reader, not an enthusiast grade SD card reader. I'm what you could call a "prosumer" photographer. I have a lower end (by todays standards) DSLR with some higher end glass that uses SD cards and I shoot photos in my free time (not for money). Sure, the loss of the SD card reader isn't great. Would I prefer there to be one? Sure. Am I up in arms decrying it as not a "Pro" machine because it lacks an SD card reader? No, that's silly.