Skimmed through the video. He's not saying much of anything here, it's basically "why don't guitarists use these tools that can do all these cool things?" without any real insight to why this could be the case.
People are alienated by things like modelers simply because they are not easy to use or understand.
The average guitarist knows how to toggle channels on an amp and turn pedals on/off, turn a few knobs while they're at it. Beginner guitarists still struggle with things like "WTF should I do with these EQ knobs?" or "How do I get a great overdrive sound?"
So now imagine being thrown a way more complex setup in front of you that requires you to go through menus, figure out a whole recording chain, has an infinite number of options to choose from...
I remember back in the late 1990s when I tried my very first modeler, the Yamaha DG-80 1x12 combo. IMO still the best user interface design on a modeler ever made. I was drawn to this amp when I saw some random guy in a guitar store play Dream Theater riffs and leads with really good sounds through it. I have no idea who that guy was, but he could play!
So of course I wanted to try the thing that made those cool sounds. I plugged in, pressed one of the preset recall buttons and suddenly the motorized pots started moving. I was like "Oh shit, what is happening?! What did I do? Did I break it?! How do I get back?!" I had to call a store employee to help me with it. Remember, this is what I consider one of the easiest to figure out user interfaces on a modeler made to this day.
This forum is full of people who have become experts in using digital modelers so we don't think much about this stuff. I can pick any new modeler and understand how to use it pretty quickly.
Then we get to the tube amps. Look at any forums, YT etc and there's plenty of people touting the superiority of tube amps. It's a club that guitarists aspire to join because their heroes play tube amps. They probably buy something affordable like a Blues JR, HRD or DSL40CR as their first tube amp, played at louder volumes at a guitar store than they are able to ever use at home.
It's easy to get a good sound out of most tube amps. Turn it loud enough, and don't completely fuck up the EQ settings.
With modelers it's often more involved to get a great sound. First impressions matter and lot of people will just abandon it if they can't get great results right out of the gate. This can be due to user error, not finding a great preset, or not having an adequate playback system.
Maybe a big part of the Tonex pedals or NeuralDSP VST plugins success is that it's relatively easy to get a good sound out of those thanks to good presets or the limitations of captures. You have captures someone else already dialed in and they either work for you or they don't.
It's worth remembering that for a lot of people making their own presets out of scratch is a daunting experience so they look to e.g buy preset packs or download presets online. I'd wager there's a lot of people playing e.g marginally tweaked Fractal stock presets to this day.
For solid-state or hybrid units like the BluGuitar Amp 1, it's tough to try to convince someone that a tiny ugly box could sound and feel as good as that big all tube Marshall head.
Even I had to fight some dissonance where I had to tell myself to believe my ears. I was able to get pretty much the same sounds/feel out of the BluGuitar as I was getting from my way more expensive Bogner. I compared them through the same cab, volume matched and played at band levels.
Yet my brain was still going "No, that tube amp must be better! Look at that tolexed beast sitting on the cab! Those real tubes glowing!"