Glenn Fricker knows some cool stuff about recording for beginners and he knows a little bit about guitar from a relative beginners perspective, but not enough to be an authority on the kinds of stuff being talked about in this thread.
I mean, have you heard him play? He can barely scratch out a few barre chords and has trouble even palm muting consistently. Anybody with that level of skill has no business speaking as any kind of authority about wood and how it impacts guitar tone because the difference between woods is something you feel at least as much as you hear. If you're an amateur player, which he is, there's no way you're going to be able to feel that, or even really know what to look and listen for, much less express that in a useful way, so of course he's going to think it's all the same, in the same way a hack painter is going to think Hunter Green, Emerald Green, Seaweed Green, or Forest Green, is "all just Green so it doesn't matter, they're all the same."
Different kinds of wood absolutely makes a difference. However, the difference is not often light years apart. I haven't heard a cut of wood that turns a strat into a Les Paul, for example. But dude, all you have to do is A/B a telecaster made of Alder and one made of Pine to start to get it. Even if two different guitars might sound almost the same through an amp, the resonance of the wood as you play it will make the experience different for you, the player. Some woods are similar and simply make different guitars feel different to play. Others impact the sound in a more direct and measurable way you can hear. Any good player knows that. Somebody like Glenn, who constantly has "guest players" on his channel for a reason, really has no business proclaiming otherwise.