I'm not bullying or pressuring anyone - if I ever had the misfortune to find myself in a confined space with you I'd be running for the door, not trying to persuade you of anything!
No-one's suggesting that alcohol, drugs, casual sex, even caffeine for that matter, are the only ways to get pleasure. We all get pleasure in many different ways. But for me, being retired, financially comfortable (albeit not wealthy by HK standards) and without commitments, it seems to me that seeking pleasure wherever it may be found (without harming others) is pretty much at the top of my list of priorities. I get pleasure from hiking over the hills, from time in the gym, from winning quiz nights, from completing the daily sudoku, from lunching with my friends, from watching games of rugby, and so on. Several of these carry risks, but I believe the benefits outweigh the risks. So why not also drinking wine, smoking a joint, casual (consensual, latex-free) sex, and all the other things you disapprove of?