Your legit reasons only apply to maybe once or maybe twice at most during a day, if happens three times then it is not a legit issue because if having that many emergencies in a single day and what you care about is whether or not do a raid or dungeon in a video game then you have your priorities completed messed up. If a parent or yourself need to do the chores then use some common sense and do them before putting yourself in a queue, even if your playing and first time have to go away to do a chore then again use common sense and ask if need any others doing or do any others before put self back in the queue. Take responsibility for your actions and the consequences of them.
There is no reason for you to miss or ditch a queue once popped up three times during a single day with your excuse of emergencies. A single emergency is understandable but three in the same day is not, if was that unlucky to have three in a single day...after the first one or two you should be reevaluating joining a queue in the first place especially if they are actual emergencies and not just inconveniences. This punishment system is fine and those who try to abuse the system by waiting till in dungeon before going afk hoping to get vote kicked will still suffer a consequence of being blacklisted by the community as in people will not group with them anymore, will not invite them to raids or hunts and might even report them for abusing the system which could end up being a longer ban than 24 hours for them.
Plus as said above chores is not a valid excuse either, do your chores before you play and like before if your quitting when pops up more than three times in a single day you shouldn't have been in the queue until they were done after first time getting called away. You do not get punished for dropping out a queue prior to popping up so you had plenty of time to evaluate whether or not have time to do the dungeon or raid prior to then and your excuses above about cat pulling power cord, throwing up plus additional power cut seem very unlikely in the sense they would all have to had to happen within the 45 seconds I believe that the window popped up each time out of an entire 24 hour period.
If your going afk and off watching TV or doing something else while waiting in a queue then you deserve to be punished for wasting everyone's time if don't care enough to even be playing the game or watching the screen when times out multiple times during the day. You should learn from your mistakes and if times out once or twice because you can't be bothered to pay attention then you should of corrected your behavior and not allowed to keep happening for a third time. Do not do high level HQ crafting while in a queue unless your willing to stop crafting when pops up, there are many other things in game could do which fills time while queuing.