The point is to stabilize and calm the body-mind-spirit complex, a harmony which is called yoga. Taking drugs, even alchohol, stresses the body and mind, and m

The point is to stabilize and calm the body-mind-spirit complex, a harmony which is called yoga. Taking drugs, even alchohol, stresses the body and mind, and may distort and cloud the spirit. This work against yoga / equanimity / clarity. There are traditions that uses drugs ritually, so is part of those traditions. Though, it is often a more perilous and dedicated path. Not everyone needs to live life as a sage or munk. So doing sadhana (practices) will work over time. It's not a competition.