The short answer is that at least some of us have lives outside of chess. So if I go take my wife and son on vacation for a week, I should loose all of my games? Of course not. Everyone needs a break from time to time. And maybe I don't feel like moving on my break -- but I still want to chat with people or whatever. Should I be banned from doing that because I'm taking a break? I think not.
Now that doesn't mean there aren't people who abuse vacation time -- particularly folks who know they're going to abandon some or all of their games and just let them timeout after burning all their vacaton instead of resigning. I've seen a lot of that and it's obnoxious. But it isn't a long-term strategy if you're going to stay around because you don't accrue vacation time very fast.
Better might be having a setting where vacation time is limited or eliminated when the game or tournament is created. That way people who don't want to play with vacation time for either side can play that way. Might be an interesting feature. Maybe even allow open seeks to be sorted by the vacation limitation as well as the other parameters.
I never und3rstand why there is a feature like Vacation setting here. I see a lot of people always online although their status seem to be Vacation ON. This is so annoying as I have to wait for my games to continue until these people's Vacation time finish. And this is more than 1 month for each player.
Vacation setting is one of the misappropriation here! I think it is the worst feature to be exist in a Chess site!
I hope it would be removed from Chess.com!