No reason it won’t pull as good as a comparable pickup power wise and I wouldn’t hesitate towing 8k + with a 6.2 Escalade. Tires? Who cares they’re expendable. Get some heavier tires or max out the pressure and tow away. It’s not the end of the world or get some LT tires.
My one apprehension with the Escalade is they are pretty much all auto level suspension and idk the limits of that. I would much prefer a traditional rear suspension for towing and hauling that could be economically upgraded a bit if it’s a little saggy. Or very least doesn’t put some expensive electronic components at risk of $$$ to fix if they fail.
If a 1/2 ton model doesn’t have common upgrades available then I wouldn’t consider it a tow rig. The Escalade May fall into this category not sure.