It's safer than tobacco and alcohol?

Let you ask you guys something. Tobacco and alcohol are causing trouble, why is it those two drugs are spared? It's kind of going off topic, but what is it the nation sees in those two drugs? Is it those drugs got a hold on the nation before people realized they were bad?

To get back on topic,

weed is a plant right? So why is it weed is being put into brownies and you have to smoke it? How come I don't hear about weed pills where weed is legal? I know some places in California have weed brownies and stuff for those with a prescription.