I understand your point also. But just bear in mind I'm speaking for myself here. Not for everyone else.
There are pretty unacceptable issues with the Quad Cortex when it comes to integrating it into a wider rig. Most of the artists I've seen who use the Quad Cortex - one of my favourites being a band called The Ocean - are using it as a standalone device, where most of the issues I am talking about are drastically minimized. You simply wouldn't notice how poor the signal quality is unless you were running 4-cable-method, or integrating external pedals into the FX loops.
Even the guys around here who do that have corroborated my view.
At various times in the past couple of years, I've had the Helix, Boss GT1000, Axe FX III, Kemper, and Quad Cortex, side-by-side in various combinations, along with a raft of pedals, and I can honestly say that the Quad Cortex is the nosiest bit of equipment I've ever tried to use with a valve amp. It simply is not professional enough in that context.
It doesn't really factor into my assessment the fact that a band can tour with the unit, plug in the main outs into the FOH, and route the other outputs to their IEM's and play a show. That isn't my world, and the fact it can do it is irrelevant to me.
And it really is a shame. Because algorithmically, I think it sounds great. Not as good as the Axe FX III, but better than the Helix in many cases. The stock effects were not even that bad, there just wasn't enough variety. Being able to load plugins on it is really cool, and I did enjoy running the plugins I own on it. It was a shame that not everything I owned was already supported - considering the device launched in 2020. That was five years ago if we're counting.
The looper block is genuinely really good. They nailed that. To this day, I'm still not sure if I'm a shit guitarist, or if the Axe FX III and default FC12 layout is buggy or what. I don't know. But I rarely seem to get a good loop using the Axe III and FC12; whereas with the QC I did. With the Flashback X4 I did. With the DD500 I did. Kinda strange.
Ultimately, I think they made a consumer device. Not a professional one. Which is fine. There is space - arguably most of it at this point - for consumer electronics. But I think Fractal wipe the floor with it just for raw circuitry and understanding of digital audio conversion and how to best optimize it to reduce noise, aliasing, and harmonic distortion.