Payload is almost always your limit, not pure towing capacity. You need to look at the maximum weight payload your vehicle is configured to carry (usually on a sticker in the door jamb) - this limits how much you can tow because you need 9-13% of your trailers tongue weight on the hitch which your car carries 100%

If you have 800 lbs of payload, two 175 lb adults you now have 450 lbs left of payload for a trailer you are left with ~4500 lbs of tow capacity using 10% of that on the tongue. It's not just people either - anything in your vehicle lowers your payload (the physical hitch itself, pets, coolers, accessories, ect)

Lots of people just look at pure tow capacity but ignore tongue weight/payload capacity of what they are using to two.

Most common F-150 configurations are actually limited on their tow capacity by payload over their advertised raw tow capacity. My 2012 F-150 farm truck has 1400 lb payload, minus two people and the hitch you're at ~ 900 lbs left for tongue weight so ~ 9000 lb pull load or ~4t

The other thing people neglect to consider is just where they tow and WHAT they tow. There's a big difference between a flat utility trailer and a square cargo trailer.

I guess my point is numbers aren't everything.

Source: 20 years in the professional trucking industry