To be fair, there are some 1/2 ton pickups that can barely pull their own shadow. You can buy a brand new F-150 with a 5K lb tow capacity. 20' Flying Cloud will max that out in a hurry. If all you've ever known was entry level pickups, you'd think you'd need to go up to a 3/4 ton or 1 ton to get some towing muscle.
But Ford also has F-150 that pulls over 10K lbs. Has Airstream ever made a trailer with GVWR >10K lbs?
You can work hard, or you can work smart. For some of us, working hard is easier.
1989 Avion 34VB, "QE3"
2008 Toyota Sequoia 5.7L "Tug"
(Is there no respect for an 8-ton GCVWR truck? *sniff* )