I have a 32u rack full of servers about 2 ft from my head all day. I have noise cancelling headphones in basically all the time.
Yeah... I bet that's legit loud.
Don't worry it's a choice not a necessity. XD I prefer the stability of stock enterprise machines over quiet custom built rigs. I used to run custom atx rack mount cases but it's cheaper to buy and upgrade retired enterprise machines than it is to build them.