I think few people would deny that there are some benefits for some people from alcoholic beverages, but can we really say, with all honesty, that its benefits outweigh its harms?
Like most addictive substances, the negative health benefits don't manifest themselves immediately, but often after years or decades, and those who haven't suffered claim all the benefits while the harms loom on the horizon. They change their tune later in life...sometimes.
As for the other harms, such as the amplification of violence, the loss of mental faculties – that same "social greasing" is the removal of inhibitions, including those that prevent people from committing certain crimes or harm against other people. How many alcohol-fueled rages would it take to make the equation flip for someone?
If the argument is that it is fine as long as it is done responsibly, how do we police that?
Will alcohol always be around? Of course. It's something that cannot be avoided, even in societies that have banned it for one reason or another. But to welcome it with all its complications, just because one enjoys it, and closing a blind eye to the harms, is imprudent.
And is alcohol truly a good solution as a self-medicant? I think you are spinning that as a net positive, but I highly doubt this is a professional's opinion on that matter, such as a therapist or a doctor.
Finally, to equate a negative view of alcohol as "...removing anything tasteful, fun, stupid..." and "...total boredom..." – to be honest, this is reducto ad absurdium, isn't it? If nothing is fun if there's no alcohol, then I think there's a different problem.