We get in a comfort zone. It's our nature to want safety, security and not continually be in fight or flight mode.
Perhaps it's due to circumstances we do not control. A relationship. There certainly Is the need for something that fills the need for comfort and releases dopamine.
Smoking was actually a very easy way to be comfortable. But, not good for us.
If you look at Quitting Smoking, Weight Loss, Athletic Achievement or any other of a multitude of things, they can all pretty much be achieved with the same willingness to make change.
So, perhaps we begin to create a new comfort zone by beginning to chip away at it?
(one day at a time)