I don't get it, negative effects?

I see a bunch of people on here saying how weed has all sorts of depressing negative effects on people, but I smoke every day possible and I feel just normal sober, and can smoke for over 6 mnths daily and quit cold turkey no problem when I want to(and have proven this to my gf), I don't even feel like my memory has changed at all.

Weed isn't addictive, some people just have addicted/reliant personalities,
I don't honestly see why beer=legal but bud=illegal
Seriously people die because of alchohol, whats the big fucking deal?