To put it bluntly, you are responsible for all game challenges you accept. The option for 1 day/move is always there, just in case.
There are people here who go on every few hours of the day, every day, every month, every year...addicts, they are the ones who play 1 day/move. That, and those who want to get a quick preparation in for an OTB game.
I just resigned a 960 game as white on the second move. When I accepted the game request, I erroneously assumed there was a reasonable amount of time and didn't bother checking. After starting the game, I realized it was 24 hours per move. Since I'm busy tonight and all day tomorrow due to a 20 hours at work, I realized it was either resign or lose on time.
Who actually has time for 24 hour chess? I know 20 hours of work isn't normal, not even for myself, but don't people have friends, families, jobs, other hobbies, sleep, and/or meals that get in the way of these games?