Health:
I will quote from Rav Dovid Cohen shlit”a whose memory is not just better, but predates mine by a little. Tobacco manufacturers quite some years ago packaged cigarettes in packs of 5, and distributed them free on street corners. Why? Even their own research indicated that addiction was established by just four cigarettes! One extra for good measure, and to cover the minority who might need it. That hooked the customers for life. The idea that allowing minimal smoking to avoid developing the taavah (read: addiction) is simply fantasy. Any tobacco company would gladly offer the two packs for free, as they know they have a lifetime client. Your humble opinion might sound nice, but in actuality, it is a myth.