If anything you're teaching your kid to respect alcohol if they want to enjoy it. Everyone has some sort of a relationship with alcohol no matter what. Might as well show through example that there's so much more to beer than just consuming it. IMO once I found out about brewing the act of drinking and getting buzzed with friends sort of took a back seat. I was more interested in what my friends thought of my beer and how the changes in my processes would affect my beer. Learning and teaching about yeast and microbiology is a great example of how brewing is so much more than drinking. Creating labels, seeing a long process through to completion, cleanliness, attention to detail, research and critical thinking, etc, etc... we could go on and on about how brewing is a lot more than just drinking and getting a buzz on. I took a while off when my kids were born just because I didn't have time. I wanted to give my best to my kid(s) and wife while also giving my best to my beer too. (no use in half-assing any of it and worrying about finding time as it takes most of the fun out of it) I figured brewing will always be waiting for me whenever I have time for it.
I have 2 kids, 4 and 2, and they both help me on brew day the best they can. I want it to be like cooking for them. Fun and sort of a tradition. You can abuse sugar too but you learn to take everything in moderation. Usually when I feel like my brewing is a bad example it's because I'm feeling guilty about some aspect of it. Like I spend too much time or money on it or maybe one weekend I indulged too much. When this happens I try to show the kids something new like how to ride their bike, or kick a ball, or even just read them some new stories to make up for what I'm feeling bad about. The time when they're little goes by so fast that you can sucked into anything and miss this valuable time with them. Just remember you have to live your life too and you're no help to anyone if you're not happy with yourself