Ummm, well a lot of gun owners also like RemOil and blast their guns with WD-40 but I suppose I wouldn't base any rational decisions on the fact that those folks exist. So I'm not sure what you are getting at.
I bought my Mark II in the spring of 1994. At some point beyond that, I took it apart for the first time. Getting it back together was certainly not as simple as, say, a 1911 or a pump shotgun. But I managed to do it with a bit of practice.
It's just NOT that difficult and I am certain that I'm not in the top 90% of men who assemble/fix things, that is absolute fact.
I do believe the Mark I-II-III does benefit from being stripped and cleaned every thousand or so rounds and I don't believe it is a horrendous, impossible, diabolical chore the way so many seem to think that it is.