For myself, and it’s totally my opinion, if my 2019 truck could not be trusted to tow 4-6000 pounds a day on a regular basis I would get rid of it and go back to Ford.
I think it’s being too protective of our trucks to think they can’t do a job they were designed to do, which is to work.
Even though I drive a limited on occasion, (when my wife lets me)I can imagine the eye-rolling from contractors with Big Horns or a Tradesman who really use their trucks.
Now if the original poster was towing 8 to 10,000 pounds on a regular basis then yes, that could be a bit excessive for a 1500z
I am coming from towing horse trailers every week back in the 1960s and 70s where the horses were 3000 pounds plus the weight of the steel trailer. It wasn’t even thought of that a truck couldn’t pull it. If you had a truck, you used it as a truck.
The C6 Ford automatic transmission and the 390 that was in it never complained. While I did not have a Chevy or Dodge back then, I would imagine they were the same.
We have trucks that are so much stronger drivetrain wise, better brakes, antiskid and stability systems. What we drove 30-40 years ago was laughable in comparison but somehow we managed.
Just dumb luck I guess...