Isn’t the purpose of the playing-hours filter to let people joining a game know when the other players are likely to be active?
Even though it’s turn based, I enjoy games more when both players are online around the same time. I can make a move, they can respond, and it feels almost like real-time play while still having the flexibility to step away for work, errands, or a break.
I use the filter specifically so anyone joining my game knows roughly when I’ll be awake and playing. If our schedules are completely opposite, the time between turns can become very long and, for me, that makes the game less enjoyable.
I can understand making the filter optional for people who don’t care about playing hours, but I wouldn’t want to see it removed completely.