Actually you do have to deal with the heroin trade. Your paying for the judicial system that seeks out and procecutes the heroin trade. It affects the society in which you live, very directly. So you are quite involved with it. How ever you having an opinion on the reproductive choices of persons that aren't in your life is not valid.
Are abortions not provided on the National Health Service? Therefore I am paying for them and - by your argument - I should have a say in them.

I'd prefer not to go down this alley of, because I paid taxes for something I feel entitled to a say in it. I paid road tax this year, it doesn't mean I decide where roads are built. I pay income tax that builds prisons, it doesn't mean that if convicted I can demand a plasma screen TV in my cell.