I blame the architect
The company I currently work for had the factory extended a few years back, with a nice shiny new server room specced out. (A windowless concrete box)
I got sent in to wire up a couple of phone lines as we started moving staff into the new block.
While doing this work, I realised that the builders had installed nothing more technical than a bathroom extractor fan, as the plans called for.
I immediately pointed out to my superiors how much this would likely cost in cooked servers, and suggested they got the builders back to tie it into the AC of the new lab next door.