It is at least worth noting that never taking sick days for work can really earn you brownie points in the long run.

My Dad had a case at work a number of years ago where the Oil Refinery he worked at was re-purposed and they had to downsize from 300+ employee's to 12 (or less, I can't remember the exact number). And with my Dad's combination of 25+ years of service and the fact he not only never took sick days, but grabbed any overtime shift that opened up... ever he was one of the 12 to keep his job.

Granted though, from my understanding he mainly does this cause my family got in such debt over the therapy I need for my autism when I was younger that the money became a sort of requirement to pay it off, fund the therapy when it was happening, and still have a good retirement savings in the end. I doubt he would of done this in normal circumstances, but it still helps to show that even if it's 100% logical/justifiable to skip a shift that not doing so can have an unforeseen benefit down the road.