You can have fun and party without drinking. Not that alcohol can't be fun, but maybe people rely on it a bit too much to loosen things up.
Of course you can, I do a lot of activities with which don't require alcohol to have fun with others, but there are some great activities which are fun with drugs and or alcohol.
Dancing, karaoke, weddings, dinners...
I'm happy about this study because I'm currently in a country where Marijuarna is illegal for recreational use, I hope this study helps change that. Edibles have to be more healthy than wine.
Alcohol is just a cheat code for lowering your inhibitions and taking yourself less seriously (because your self control is turned off). I can respect doing that, but it is not at all required to drink or partake drugs (which I'm not fundamentally averse to either, to each their own) to lower your inhibitions. It just might take therapy if for... reasons...you are particularly self conscious like me
I though being drunk made you less scared, anecdotal evidence made me reconsider.