Interesting points, guys. I suppose it all comes down to personal freedom vs societal consequences, a classic conservative paradox. We can look at states like Colorado who've legalized it. The impact on youth usage and DUIs could be informative.
A hearty welcome to you! As a long-standing member and fervent supporter of the Grand Old Party, I always relish the chance to engage in productive discourse about our shared principles. May your journey here in /r/TheGOP enlighten and embolden your political convictions as much as it has mine.