It's ultimately a tricky thing — people want to watch reviews of computers, they want those videos to be well researched and relatively nicely produced, and they say they want them from non-reviewers or people who don't do video production. Well, the problem is pretty obvious, and let's go through the timeline of someone who decides they want to give the people what they want.
I think a few things are going on here. One, people underestimate how hard it is to review products well, and they do value reviewers who have done a ton of them to hone their craft, even if they don’t realize it. These experienced critics are able to figure out what to talk about and what people are going to be interested in, which is not something that comes naturally to almost anyone. Go ask your significant other or a non-techie friend to review their current laptop and see if they hit all the points you'd want to know as a buyer. I'm guessing they won't. It might be interesting and even useful feedback, but I'd be shocked if they dig into the data and comparisons you want from a formal review.
Two, people like to say that they want to see someone use a computer that's not doing video production. As shown in the 9 steps above, once you start doing video reviews of products, you naturally end up being a video editor.