While hunting for photos to share as a belated "gotcha day" to Kat, I came across this video.
Some habits sneak up on you, getting incrementally worse until they manifest as they do up there. Compare that to a more recent video of my riding:
Which I choose because I feel it highlights that I am learning to sit UP.
Thank goodness that although habits are hard to break, they are breakable. That's the lesson to take away here - it's super hard and requires dedication and continuous effort, but it is doable.