that's highly unprofessional, i hope not everyone playing this have such mentality
what if Larian said the same and had to release the game a day late because they faked a sick day? would you like that?
You're taking this too seriously. Even if the entire company somehow called in sick (unlikely in a realistic context) I'm pretty sure the game would still release, it's very customary for companies to give massive amounts of leave after release and have only a small on-call team (or person) to deal with extremely drastic issues but most of them we'll get logged and put on the backburner until the devs get back to continue putting out patches or new content.
So your example is a poor one and it's not really a huge deal; people were doing it since I was a teenager. I can't tell you the amount of people back with EB Games midnight releases were a thing (pre Steam glory days) were happily saying they were calling in the next day.