Why are people always getting into pissing matches because they think what they have is better

Because they are insecure and, probably lonely. Mostly the former, I think.

Maybe it's because TUBES are better than SS.

it depresses me when a thread devolves into argument. Seems to happen on Audio Asylum a lot. Its usually the same few guys who know it all and say there is only one way. I am relatively new to high end audio and learn plenty from these threads and truly don't understand how people can take themselves so seriously and talk so loudly and definitively about something like audio that is so subjective. I simply stay away and don't respond to those folks. jet

I disagree.
  Richard Galliano is substantially better accordionist than I am and has substantially better accordion than I am.
Even if I practice for the next 5 years 8..10hrs per day, I might not reach his incredible skill of jazz accordionist. 

Read anything by Dan Ariely – especially "Predictably Irrational" – and it will become clear to you pretty quickly. He also has several TED talks you can watch online...