I can't tell if this is satirical or not. When I have "free time" at work, I put that time towards refactoring, improving/expanding test coverage, and scouting

I can't tell if this is satirical or not. When I have "free time" at work, I put that time towards refactoring, improving/expanding test coverage, and scouting out potential performance boosts through our logs, load records, etc. Do devs in actual programming positions do this?