You certainly are correct.
And the real facts of life are that on most of the interstates, you have to go several miles to an exit, then go back the way you came to the next exit past the accident and by the time you do that you will be at the back end of a traffic jam so long you are of no use anyway.
Most medians on the modern I-s are really wide with trees or banks between lanes or they have crash barries of some sort. Some even concrete walls, as you well know.
It is just that some forget that when they are at their 'puter.
Yeah ... in my case it was dark and raining, and by the time i got to the kind of exit that let me turn around and then drove back to the scene (where i had to find another exit to turn so I would be back on the right side of the parkway), it was easily 10-15 minutes later -- and that with minimal traffic.
I saw the cops were already there and I kept going...but, you know, if I hadn't have gone back I would have been consumed with wondering if I'd been needed. And yet I don't judge in this situation. It wasn't late on a rainy night and this guy probably had every reason to assume he'd taken care of it.