Ugh?

I suspect that the reason that this scheme is the most common is not due to everybody sharing your dislike for it.

it would be a bit more involved for a program to do

You understate the problem; rather than a bit more complicated, it would likely be nearly a dozen bytes more complicated.

I personally prefer titles that read well. I don't believe that I was the only one following that scheme. The plural cases would read particularly awkwardly ("gods wiki", "janitors wiki", ...).