A lot of festivals in the US had problems with heat stroke in the late 90's and early 2000's. The two solutions were to either give out free water or allow people to bring in their own water.
The festival organizers generally chose supplying free water.
If anything, I see this as Microsoft trying to kill what the Steam Deck can become.
Right now, the Steam Deck is one of the best selling Linux computers. You are also starting to see other manufacturers look at the Steam Deck and compete against it in hardware while using Valve's free software. From that, it isn't much of a jump to putting Valve's Linux stack in desktops and laptops.