So? Singapore doesn’t want any drugs in the country, and put up draconian laws. Just don’t break those laws.
If I tell you that I will brutally murder you if you come to my house wearing a red tie, and you do that… Your death is at least partly on you. Because you had absolutely no good reason to do that.
There is absolutely no positive outcome to selling or consuming heroin. Just don’t do it. It’s not a hard rule to follow…