> I learned via a friend that there are many hidden addicts in society. There are professionals who shoot H just to maintain and avoid getting dope sick.

A typical daily heroin addiction costs $100-$200 a day, or ~55k/yr. Some professions can cover the expense, but it costs serious money. When continuing with your career while addicted the user is put into a hard situation. Too many sick days from an empty bank account, a bad deal, or a lack of access can cost someone their career.