I think it's mostly inevitable, to me it's no different than asking group of farmers which make of pickup or tractor is best, or a deliveryman which brand of shoes are best... I'm pretty sure you could come up with at least one analogue for most any vocation.

In programming, we have: language, practice (formatting, documentation, framework, etc.), methodology (testing, planning), development environment (integrated or otherwise), etc. and each of these is a lightning rod for disagreement. I think it just seems to be more prevalent for software engineers due to the fact that a majority of our discourse occurs online.