Most smokers have to learn the hard way. Smoking is as hard to quit as addicting narcotics are.
Years ago, I was on a fly in fishing trip in Canada in the middle of nowhere. One stormy evening we get a knock on our door. Everybody in the group looks at one another, like WTF. A guy from a lodge 30 miles down the river system was having withdrawals. I was smoking at the time, so I gave him a pack and he went on his way
Some years later I decided to quit. I quit smoking but got hooked on the nicotine gum. Went to Canada and left the gum at home. After a couple days I had no further cravings.