Well, to be fair. She is wearing a high-tech earpiece that (somehow) shows her augmented reality on her status and surrounding information.
I am one who likes a lot of information on my HUD, but I appreciate that the developers allows you to customize the HUD to your taste.
I think you're focusing too much on defending the game he used as an example. Contextually you have to activate the earpiece and that's when you get the augmented reality pink and purple reality digitisations/robot paths etc. Dynamic also isn't 'off' but usually just contextual whether you're in a battle or not. You could probably substitute Batman or something else in its place, maybe AC Valhalla as well.
The difference in batman and valhalla though is there a lot of verticality, whereas Horizon is generally just a flat long plane (with exceptions like the ruins and cauldrons. And don't forget this is without detective vision/earpiece/odin sight/survival instincts etc. Which is really just another HUD overlay
If you comapre it to say Red Dead Redemption 2, then they generally are part of the scenery but still discernible without the need for a hud element/pointer. They still do appear in detective mode but they are a more subtle gold and you see the pollen emanating.
However, even RDR2 has problems without the HUD when it relies on controller pulsing when you turn it off at a system level. I don't think he is saying the HUD is bad or good, I think he is just making a point of what is actually essential there and can it be shown in game rather than overlay and clutter up all the effort in the artwork.
I agree with you, that I like customisation in my HUD but I find most games lacking in options, or the presets like minimal, normal, all are too broad. But when you come from PC and mods it sticks out more on consoles I guess. Or there will be overlaps, where you can disable ledge markers but it also disabled something else. Or you disable hints and on a few missions some critical information no longer appears. I really hope we see some improvements on this going forward for consoles personally.