All valid points. But regarding the measurements, neither LTT or GN testing methodology are realy scientific. Those are youtubers with limited understanding of experimental design and analysis. I have never seen them do simple significance tests or try to explain the variability in the data. But I havent watched all the videos so 乁( •_• )ㄏ
For the variability point, they do tests in as a controlled environment as they could, and do the tests until they get consistent data. But what do you mean by significance test and how can they do it?
I agree they're not the gold standard but they're the best we got in terms of independent third party testers, and I would assume they're more than good enough for tech stuff.