You can't to the same degree. If you let the user use a typical desktop environment like gnome or plasma., then they can set their wallpaper.
Now if you want to make a kiosk thing, so much easier in Linux. But if you want to have a general purpose desktop experience but restrict stupid stuff like wallpaper, windows has got you.
I would rather use and administer Linux systems at scale any day, but if you hated your users and wanted to lock personalization, then Windows has done the work to enable that.
This is hilarious, because every single facility of note, and especially datacenters has local, grid independent generators. Datacenters in particular have been noteworthy for pushing for 'off-grid' power plants to give them more control over their power and costs. In the more reachable territory, residential solar promises value by mitigating your exposure to eletrical rate changes, and in some cases combined with home energy storage, people are going off-grid. A lot of commercial interests also pad out their facilities with solar panels, because it is cheaper than sourcing entirely from the grid, and this was before the recent rate hikes inflicted by datacenter buildouts.
His analogy is bogus because he implies off-grid energy generation is a thing of the past while AWS itself is a huge driver of off-grid energy generation in a world where off-grid energy generation is actually increasing.