Those receivers are actually 1-1/4", not 1-1/2".
I've installed many little hitches. They often bolt through the pan of the car where the spare tire goes and and fastened through sheet metal. WHne those say 2,000#, you better listen.
On my wife's Pilot, the frame hitch bolts through the rear subframe, which is big and full length, and I believe it would hold anything. 4,500# for streamlined wieghts and 3,500# for non-streamlined weights is the rating. I've never towed anything with it, but we have a big box that fits on the receiver for luggage on long trips.
I have a Draw-Tite Ultraframe on my crewcab. I see 3,000# tongue weights when I put my Bobcat on it backwards. My big truck has a 9" deep x 1/4" thick frame. A Ranger is 6" by 3/16", which is respectable. My big truck has 9 leafs and a 7,500# capacity rear axle. A Ranger has a 2,750# axle, semi-float, which means the axle shafts are load bearing. A real truck does not have load-bearing axle shafts.
The thing about a towed load is the heaviness of the ring gear in the truck. All of the load has to be absorbed by the ring gear. You lift off of the gas, the whole load hits the ring gear. The axle supports the load, the ring gear has to absorb the shock of accel/decel and also propel the load.
I hate my big pickup, but it's got the capabilities I need. I'm building a Ranger to do those things, though. I want to get rid of my big pickup.