Well, the advice you were given is valid of course, but if yoou just take such luminaries as The Rolling Stones as an example, most their best songs were wrutten by a totally 'stoned' and.or drunk Jagger and Richard and much of it performed the same way, the majority of them are still very alive and kicking. I see a lot of Folk musicians who could lighten up a little. Personally as I age I drink less amd less while performing. I's all a very individual thing I feel