While I think the tfl videos are pretty silly, the Ike is a good benchmark kind of test that is easily accessible and consistently repeatable. (IE don’t get stuck doing 20mph up some grade 1/2 the time and have to make repeated attempts at a “best” run.)
Does everyone drive I70 in CO? Nope, but there’s a 99% chance your rig, apples to apples will perform as well or better in the vast majority of conditions as it does pulling that grade.
If a person is not interested in performance and only getting from point a to point b, then it probably doesn’t matter to that person.
Doesn’t dispute the validity of the test though.