Sometimes I philosophy, but then some noob gets rekt and im like lol get on my level #youcantseeme #youcantformalizethesensationofsight #johncenabeatsaristotle
somebody needs an attitude adjustment
or maybe SISTER ABIGAIL'S KISS
It's pretty interesting, and although OP brings up some good points, I would argue that the inability to change someone's mind is a bit bigger of a problem on the internet than it is in real life, if only because real life isn't quite so... anonoymous. You probably value the opinion of someone you know well, and would therefore consider it over the opinion of a random stranger.
in reality you can't rewrite your argument or formulate the perfect rebute on the fly- the internet lets you edit yourself, and you can never lose. The problem is that in these arguments, there's no third party. In a debate, there are the opposing sides, but there is also judges, who make the final call. In a debate, you're motive is to persuade. In an internet argument, your purpose is to put your opinion out there, and never falter, or you lose.