It does concern you when they drive down the road drugged, or the costs to health care, the impact on generation. 
How many Canadians will be impacted and harmed ? We all must fight this with everything we have.as it will damage a generation of young people and we have a duty as adults to protect them from harm to the best of our abilities. How many do you think know this information? 
Health Canada and the government acknowledge the science that says men who are wanting to start family should not use marijuana because of risk to reproductive health.
In 2015 you as a taxpayer helped pay out the $180 million to 100 victims of the drug thalidomide that some very reckless government official allowed on the market inspite of acknowledging the harms - we paid and we will pay for 100 more years if this drug is found to do generational damage. Marijuana is showing generational damage - and there are 1 million grade 12 students using marijuana and they are vulnerable - they do not know risks