You manifestly don't believe that smoking is good for you so I assume you don't smoke tobacco.
Likewise you think that hydrocarbons will kill you, your offspring and the planet so I assume you don't use them either. Because let's face it the only way to stop hydrocarbons being used is to stop using them. No petrol or diesel, no plastic, no coal powered electricity, no copper or aluminium, no cement, no building materials. Nothing that comes from hydrocarbons.
Are you doing that? Are you setting a good example and encouraging everyone you know to follow it?
Yes, I don't smoke tobacco. And I generally avoid sitting in confined spaces with tobacco smokers.
However, I don't believe hydrocarbons will kill me, my offspring, or the planet. I do think that atmospheric CO2 negatively impacts the climate and lowers all of our standards of living. And I think ocean acidification is bad. Furthermore, I don't think you should be subsidizing my price of hydrocarbons. And if I choose to use hydrocarbons once the direct and indirect subsidies are removed, that should be my right -- that's how a well functioning free market works. People who don't drive cars shouldn't subsidize those who do. Government, through fossil fuel subsidies, shouldn't be "picking winners"
This isn't about "setting examples" but is about an off-balance sheet liability for the planet which will be a drag on productivity and standards of living for future generations.