That's the thing though, expecting users to have a discussion over even minor changes is extremely off-putting for most potential editors.

I've also noticed that a few of these editors seem to be deliberately abrasive towards new users, perhaps with the hope that they'll break a rule by posting insults in frustration. The moment that happens those editors quickly run to the site administration and try to get said user banned. Wikipedia's policies are increasingly treated as a weapon to beat down dissent rather than a guide on how to contribute positively.