It's perfectly rational to think that the law against meth use is unjust while being otherwise law abiding. Most people would consider drug use an issue of personal freedom.
"Otherwise law abiding"? That makes no sense. If you're considered law abiding by following only the laws you consider "just", then everyone is law abiding.
Law abiding literally means you follow the laws.
Not Trudeau or Biden.
USA's OSHA attempted to mandate use of a new drug. Canada still requires use of the new drug to visit or live there. Most of EU-country vaccine drug mandates expired June 1, and OSHA lost their court case months ago.
There are millions of legal amphetamine users, some of whom are prescribed meth.
This kind of conversation is pretty useless without considering the health outcomes for that group of people, since those consequences are overwhelmingly positive.