IMO it’s not really “shitting on something” to just say it doesn’t profile amps very well. It's just a fact.
All the other stuff is just moving the goalposts to try and make the Kemper superior at something else, which is all well and good if it matches your needs but it still doesn't negate the fact that the Kemper is inaccurate at what was once its USP. I don't own a ToneX or NAM pedal (or play live) but for how I used the Kemper, I was barely using any of the built in FX anyway so my theoretical use case would be integrating it with other gear.
At one point in time, Kemper was the best option for capturing an amp. Now it is not.
I think the point of this discussion is that statistically, the Kemper will have bigger differences more of the time than other options. Kemper is not equally inaccurate to other platforms, and it's quite far behind now. I don't think that can really be something that is an opinion or subjective, there are all kinds of blind tests, null tests and just real world examples to verify that which are very easy to do. I still don't find NAM or ToneX to be perfect, but for me its like Kemper is at 60%, ToneX is at 85% and NAM is 92-95% perfect depending on how its trained.
And tbh, it's not just NAM or ToneX, there is also Tonocracy, STL Tracer too. If you include the QC's capturing, then Kemper is in 7th place. Is Kemper more accurate than Headrush? I don't think I care at that point, but thats the level its at.