It can PULL more. It just can't handle much for vertical load. This is true of all Teslas. They are all aluminum frames. This is specifically for things like a cargo or bike rack. The leverage becomes greater every mm away from the hitch the weight is. There's some question of what a stress test would show. But the problem is there's no standard distance for those type of racks from the hitch.

Imagine a 10 foot steel bar in the hitch, and you hopped up and down on the end of it. If you weigh 200 pounds, you're applying roughly 2,000 pounds of effective vertical weight on the hitch. If you do it again only two feet from the hitch, it's 400 pounds effective vertical weight. What is the actual upper limit of effective vertical weight for a tesla hitch? Likely much more than 160 pounds. But that's what is put in the manual because they don't want to warranty the hitch because of the composition of the frame.

The real issue is that the hitch is attached to the frame, and the frame is aluminum. So it's not the case where you might bend the frame and could then have it bent back to good working order. If you put too much weight on a Tesla hitch, the frame itself will simply fracture.