That could very easily work - depends on the ambient. If it's in a polar region there's no need for AC - just vent the top off and use good filtration. Problem is we can't what's off the picture, perhaps they have evap coolers.
It couldn't they said themselves it got like an oven in there.
Evap coolers wouldn't really work in an open room full of miners, you need something to separate hot/cold air... a raised floor something like that hot/cold aisle.
The only way an open room setup could work is with an insane amount of AC or like you say being based in Antarctica
It's 100kw of heat and by the looks of it around 2Kw's of air con that's why I lol'd
Evap coolers would work, but yes you do need segmentation - that's how my farm runs.
That room has quite a bit of volume as pictured, probably more if we pan to the left. 2 high volume fans could easily clear out the heat as long as ambient was reasonable - it's doesn't need to be Antarctica.
Even been a blast furnace room - now that's hotter than 100kw of heat!