I can’t figure out how to make a new forum thread to talk about this, but I feel like you have brought me to an epiphany: I, also, have no personal evidence that there is such as thing as a “habit.” Can the entire world really be so wrong…?
I can’t think of a single thing I do regularly that isn’t motivated by a distinct external trigger and/or explicit conscious decisions. Then again, I can barely even think of a single thing I do regularly. Maybe I have no habits because I have no daily routines in my work or social life; I wake at a different time and go to a different place every day of the week.