I agree with you.
OTOH, some of the most virulent anti-smokers I have personally encountered are heavy duty pot smokers. I know one woman that would sit in her living room and smoke a joint, but no one could smoke a cigarette in her house, including her husband because the second hand smoke would hurt their 9 year old daughter.
I've got nothing against pot smoking, I did my fair share of it when I was in college, but can someone tell me which exposure is more unhealthy for a 9 year old - dad smoking a cigarette or mom getting stoned everynight after work?