Every time I have tried to edit anything in Wikipedia I have run into a very ego-driven community of long-term editors who don't much care for outsiders playing in their sandbox. The levels of "proof" and "citation" demanded to make even the smallest correction, often far beyond anything backing the preexisting copy, means only those with ego-driven determination are likely to have their edits stick. I do care a little that a wikipedia article is incorrect about a topic related to my profession. But I don't care enough to engage some armchair lawyer/soldier in an epic back-and-forth debate over a period of days/weeks. So I back off and just let the errors sit.