If they want hyper-players that get bored in a nanosecond and have nothing else going on in their lives, continue on!
Setting aside how that comes off as a little judg-ey, I find there is more than enough time to rearrange my city and "play normally" with the current format of events.
With only the slightest bit of preparation, one can reach the locked quests in a few days and after that, the event is effectively over and you can complete the rest of the quests by accident with normal gameplay.
That's just a few days of the event followed by several weeks of nothing.
The FA can be a week of frantic activity IF you choose it, but it is also extremely accommodating to almost any desired schedule: From making logging every day or even every second day for 5 minutes to logging in every 5 minutes for several days, the options are there.
So where does that put us?
Every ~60 days we have an event that requires attention for less than a week and an FA for a few days as well? So ~10%, maybe 15% of the time?