I think people do discredit the potential of weed for a couple reasons.

I smoke the absolute best bud I could get my hands on, and I sit back, and can literally go into a daze where thoughts rush around my head and minor visual patterns can be outlined and formed and just barely recognized.. after smoking half a bowl of it. I usually smoke on the most empty stomach I can, and about 20 minutes after I wake up and relieve myself I get stoned as hell.

I'd estimate a lot of people have never experienced truly being this high, because a lot of people do not understand the differences in quality of weed, and a lot of people don't even inhale properly. Not to mention joints and blunts waste a whole lot more weed than any other smoking device.