Most people tried for whatever reason, some didn’t know enough, some didn’t care enough to not do it, like athletes that run until they fall, some don’t realize the dangers, some don’t care about them.
Then there is “come on if you want to hang with us” “why should I care about myself if no one else does” (real people that I’ve spoke to told me this stuff, the second was a 14 y/o girl with a loving family and a solid group of close friends) and all that stuff that makes people start smoking for the most part, I’ve had countles people tell me that if I didn’t start smoking ultil now I might never will, I know it doesn’t sould right lol.
I had classmates who considered themselves adults because they had a driving licence for the car daddy bought them and a gf/bf so they are more mature and have purpose in life, they get drunk at parties like they saw real adults do on TV and how wouldn’t they fancy smoking a fag then? It’s usually being close to people that makes you feel their defects (this behavior) aren’t that bad and in some cases flip your perspective, I know more than 30 kids that started 9th grade in diverse groups with diverse behaviors had the usual proces of listening to others and chalanging their ideas and after 4 years went paths you would have never expected from them.
From my experience people start smoking in uninspiered moments then try to give up but can’t. That’s it.