Like literally everything in life, your experience may vary. To say Cannabis caused your issue is also irresponsible. There are a ton of factors that could cause it.

The fact is, every substance has side effects, some severe, to every person. There are people out there that could eat a peanut and die.

You can blame the Gov't for making it a schedule I in the first place which resulted in stopping research of the drug. Cannabis has far greater benefits as a medicine, than side effects. It's safer than Tylenol, Ibuprofen, etc. Which is in every American home.

It's everyone's personal responsibility to know what they are consuming.