People who have been infected by drugs no longer have a functioning will.
Your assertion that the only difference is the delivery mechanism completely devalues personal responsibility and accountability because it implicitly denies free will.
You are familiar with the consequences of a chemical addiction? Free will is the first casualty.
That is a very dubious assertion, especially when there is an actual and far more solid case of national defense that is being ignored: the invasion (aka "undocumented immigrants").
A failure to comply with one defense, does not justify a failure to comply with another defense. Yes, you are right, we should be stopping illegal immigration, but we should also be stopping drug distribution. Just because we fall down on one job, doesn't mean we should fall down on the other.
Indeed, if it is a national defense problem, why would you be more vitriolic about drugs than an actual invasion?
You have not heard me rant about illegal immigration, but rest assured I do. We should make the border a free fire zone with automated guns and remote cameras, the same way Israel protects their border. We need to toss people in jail who knowingly hire illegals. We need to deny any sort of public assistance to illegals. We should not recognize their children born here as citizens. We need to deport them back to their home country as soon as they finish their mandatory jail term for sneaking into the country illegally.
But again, just because this nation is completely blowing it's response to illegal immigration, it does not justify being incompetent regarding drug distribution as well. Two wrongs don't make a right.
Only a minority of those who use a given drug ever become dependent - even for heroin, less than a quarter of those who have ever used it ever became dependent.