I was curious about this myself, so I went and weighed my rig to get exact data:
I have a 26' rinker cuddy cabin. It weighs 5500lbs
My 2015 F-150 FX4 weighs 5520lbs. It is rated to tow 8000lbs
My venter aluminum trailer weighs 1320lbs.
All together, my tow rig weighs 12,400 lbs.
My trucks tiny little 2.7L turbo v6 pulls the load just fine. With my foot halfway down on the floor, the engine revs to 3500rpm while I'm accelerating on highway on-ramp. Some old-school truck dudes might find that unacceptable, but it's fine with me. It's a turbo motor. They're supposed to rev high.
I put powerstop Z36 HD brakes on my truck, and Kodiak 4-wheel disc brakes on my trailer. The rig stops OK. I wouldn't want to drive it through Dallas TX rush hour traffic though.
I use 4WD low to yank the boat out of the water. I barely tap the gas pedal to get the truck moving and pull the wet boat up the ramp. It can almost idle up the ramp.
Wrangling a 26' 5500lbs boat onto the trailer isn't super easy, but totally doable. I'm a 37 year old 6' 200lb average joe. Not a body builder, nor an obese diabetic. I generally break a little sweat cranking the boat onto the trailer. Powerloading is illegal in my area, and it's bad for the environment.