As a on and off tobacco addict with an addiction-prone brain/personality: Unlike coffee, video games, etc, tobacco addiction is terrible and you can really feel your health declining over a decade and more. It's not so much about dying 10 years earlier that's worrisome, it's about not having much quality of life.
As to being addicted to nicotine itself and consume it in the form of vapour: much less worrisome. Still, it's not great: withdrawal feels awful and is psychologically debilitating.
As to being addicted to nicotine as a high schooler: this is quite bad because the brain is still in heavy development and drug habits picked up in this timeframe tend to stay with you forever. Quite a compromise.
I'm familiar with nicotine addiction. I dipped and smoked a pack a day for 3 years starting as a 16 year old, quit for 5 years, vaped for 2 years, and quit again. That was probably 2 years ago. There are positive effects but it was annoying to need it so I quit. Excessive internet usage, pornography, video games, and coffee have been overall worse for my quality of life than tobacco or nicotine in it's various forms. I did pretty much every category of drug in that time range of 16 - 19 and feel no carryover of habits.
As to being addicted to nicotine itself and consume it in the form of vapour: much less worrisome. Still, it's not great: withdrawal feels awful and is psychologically debilitating.
As to being addicted to nicotine as a high schooler: this is quite bad because the brain is still in heavy development and drug habits picked up in this timeframe tend to stay with you forever. Quite a compromise.