This isn't universal but will tremendously help quitting. There will still be the nicotine issue, but it will help clear the other factors that can be as powerful as the physical addiction.

Or it could be - you figure out why you smoke in the first place, and have to accept that you can never quit

Because you know why you are smoking because you are addicted to nicotine.

so the symptom is the cause

The cause why you started smoking might have gone away but you are still addicted to the substance. We don't have the same chemical addiction with doom scrolling.

hey man, it was your analogy

And it still stands.