Quote: "But if the trailer has brakes
then it is rated higher. Nothing about the TV has changed but an external condition (brakes are added to the trailer) has increased the rating of the TV."
Can't agree with that as a blanket statement. Some vehicles have separate ratings for towing with and without brakes
but, unless that is specified, I don't see any way you can justify towing over the stated limit.
For that matter, as almost all trailers over 1500 lbs come with brakes
, (as is required in many jurisdictions) raising a stated 2500 lb towing limit because one is towing a 3000 lb trailer with brakes, just begs the question.
Towing is as much about pulling and handling as it is about stopping.