Exactly. Ive never had an agency, editor or any client ask me if I was using an APS-C or FF sensor camera, or if I was using a Rebel or a 5Div, they dont care as long as they like the finished product. Thats why I get a kick out of online forums, the guys shooting to show off their photos online, obsessing over DR for their shots of their kids or some random shot in a park and spending thousands more on f/1.2 lenses because they are convinced that f/1.4 (or *gasp*, f/1.8!) just wont get them that amazing bokeh and quality images to post on their Flickr Its great entertainment.
When I finally realized that the forum's "X camera DESTROYS Y camera for X/Y/Z reasons" talk is all just opinionated hyperbole mumbo-jumbo it made the process of actually taking photos so much more enjoyable. My cameras are each more capable than anything people had just 10 years ago, yet everyone managed just fine back then. Me thinks people worry far too much over minute differences in "image quality".
Sure when lighting is not challenging or AF is not challenging then just about any camera will do. Get away from “nice conditions” and you’ll quickly appreciate the more advanced cameras abilities.
But the post he quoted you on made claims over Rebel IQ being far worse than your Sony gear... he showed that the difference in IQ isn't nearly as important as you implied. Your original claim had nothing to do with any other conditions.
Take that model into a very dimly lit bar and let's see the rebels shine. I've used rebels and 7d cameras and I know their high ISO limitations compared to today's full frame cameras like the Sony A73. Let's not even get into trying to accurately focus on the eyes with a fast lens.
I still claim you cannot create a comparable light kit using a DSLR system as you can using something like the A73. It's true competitor is the 5d4...not some rebel. I looked at some of your posts and I understand you just don't like mirror less, but really you are trying to tell me a rebel based kit is compatible to a A73 or A7R3 kit.
Which rebel and which 7D? Canon's old 18mp sensor was severely lacking in high ISO, from everything I've seen this isn't really the case with their newer APS-C sensors. We're talking about at most a 2 stop advantage for a modern FF... for many/most users it's not worth fretting over.