As clever as Linus is, he is NOT an electronics or test eqt channel, and were I him, I'd surely delegate that kind of approval to someone live Dave, or countless members here.
And what equipment Dave has to make such measurements? Not to say some specialized tool which will do it very fast and hassle free. What incentive he has to spend time on this to begin with?
Dave is an EXTREMELY experienced, qualified electronic engineer with many decades of experiences, whereas Mr Sebastian is a youngster, and with all respect, a bloke that plugs modules together and tests them - and yes that is a job requiring experience, but unless I am lacking info regarding Mr Sebastian, he IS NOT an electronics engineer (I've seen plenty of times where he appears rather clumsy in his videos - either he IS, or intends to portray that image... although... WHY he'd want to do so is baffling)
Your open-ended Q regarding Dave's "incentive" et cetera... sorry, but what? I am confused as to what you want to know - a rather poorly worded question?
You don't need to be an EE to test a cable.
The equipment generates a test report, and he was focusing on the Pass/Fail aspect of it. That is a lab technician job, the qualifications for those are high school diploma.
Watched a bit of it.
Doesn't look like signal integrity measurement to me. So likely just packet error testing.
Thanks for posting this picture.
I think it is using the MAX3987
8.5Gbps Quad Equalizer and Preemphasis Drive
The package, high speed signals pinout seems to match.