EVALUATION and COMPARISON of harm is literally how the world works.
Every single decision every human being makes is based on these principles, for the simple reason that everything can be harmful in some way.
Your lie is so big, so brazen, and so absurd it destroys everything yuo base on it - which is everything you're saying here.
You are not trying to evaluate harm. Indeed, you are constantly assuring us that there will be no harm from your pet drug. What you are doing is trying to justify any future harm caused by your preferred drug, by pointing at other harm caused by a different drug.
You are trying to get us to buy into your assertion that "Two wrongs make a right." and we're just not going to buy it.