That only proves that each of us are different and what we saw differently influenced on us. That tells that not every child who saw parents smoke becomes a smoker too. It might also be that we were totally different generation that our children today. Children in past were spending much more time with parents, helped them, learned from them, copy them. Today children maybe even learn more from gadgets and online world than from parents. You might smoke in front of them and they dont even pay attention to it. But if they see some celebrity smoke, influencer or in game there is option to smoke, then they might get attracted with that.
And that's why we like to ban social media from these kids.
If their parents/guardians are such deadbeats that they don't want to spend time with their kids, they will turn to internet engagement farmers who see no profit giving them toxic, unsustainable and narrow values.
They aim to create army of hooked incel fans that will never leave, because they will never learn from them what confidence or love actually is.
Also, i gather that you don't have kids, as parents are supposed to do way more then be front of them as an example and keep them alive. They pay attention if you are actually parenting them.