For clients, using the editor makes sense, until you want to edit dates/times.
They can edit everything (ie. on an event schedule) except, you guessed it, the date/time. So you might as well stay in the designer mode to get the job done.
Here is past webflow project that is heavily date/time dependent.
I sort CMS data based on this this date/time picker field. So changing it to text for the sake of editibility wouldn't work. Then I cannot sort properly..