doesn't weed make u think less sharp? or less smarter, less aware less alot of things, (kills brain cells)?? so how did tupac be able to right all these great songs of his wen he was always high???? im so confused,

Now i feel like if i smoked weed i can think better and and do better in college and in life... its so confusing how tupac was writing great songs that made sense, somthing that i think i high person wasnt able to do, but it happens with tupac....

what if he wasnt high when he did his tracks? would that make him think better ? more clearler to what hes writing? and writings better? better thoughts etc etc??
is this for real? should i start smoking weed to do my homework? and tests? bcuz damn its tough