Agreed. Because it's great coming in healthy and sitting next to a guy that's pre-pneumonia, hacking and getting infectious mucous all over the cockpit because it's more lucrative to fly sick and sell back the 9 hours to pay the alimony/college tuition.
That's the psychology of it like it or not. It's more financially beneficial to fly sick and pilots here do it. It's allergies. Sure. I'm not infectious. Sure.

Can everyone honestly say they've not nursed a cold/sore throat etc. to preserve PTO?