There are a few problems with this. First, sarcasm is often used in an "amirite, guys?" kind of way, as a means of reinforcing the status quo in a community and

There are a few problems with this. First, sarcasm is often used in an "amirite, guys?" kind of way, as a means of reinforcing the status quo in a community and shutting down dissent. For example, you'll see this in pretty much any thread on r/games that discusses sexism or violence in the videogame industry. Secondly, I've found that when an argument seems stupid to me, there's a good chance that I'm missing something. Whether we realize it or not, we all live in very insular bubbles, and often we lack the context and/or empathy to fully understand an issue from the other side. Third, you don't change hearts and minds by being an asshole. It's, like, chapter two of "How to Win Friends and Influence People". Sarcasm is kind of, well, masturbatory in that sense.