In the film world, the 35mm Rebel SLR is not considered a 'pro' camera in any way. It is an entry level,..."Oh, does the lens come off?"...holiday and birthday snapshot...never anything more than 4x6 printssort of camera. The most expensive combination and model of the Rebel (T2 QD) wouldn't cost any more than 30 rolls of Kodak Gold Max (Ugh!)...about $300. In other words, you could buy 5 of them for the price of an EOS 1V.
In the digital world, the marketing guys decided to tack the word 'pro' onto ANY camera that had interchangable lenses. So the Digital Rebel gets classed as a 'pro' camera when it really isn't.