The thing is that I do not agree with you that the ends justify the means. You seem to think that people seeing fewer pages in the wrong encoding in the long run justifies making the problem worse when it does happen. I do not.

And again, I will reiterate that this does not solve that problem anyway because vast swaths of the web are static content that was put there and never touched again, so no one will fix it. Unless we want everything to live on content farms, it is essential to be able to access content like this. You are viewing the web as something that is actively maintained, similar to a software project. That is true for a certain category of website, such as the one that we are on right now. It is not true for the kind of website which is most likely to have borked text encoding.