It would seem that if a market were truly 'lucrative', then efforts would be made to develop and capitalize upon said market. Since said market is almost completely ignored, it can be reasoned that it is not lucrative. Or at least not lucrative enough. Ergo, if it were anywhere near as lucrative as you'd like it to be, Turbine would be tripping over itself to develop PvMP content for you.
The reality of the matter is that all minorities tend to be much more vocal than the majority. Thus, full time creepers, whilst very loud and persistent, represent a very small population of the player base.
When looking at things from a business standpoint, no company is going to waste it's time making niche things for minority markets, when they can spend their time making mainstream things for wide and vast markets.
I'm sure this simple logic doesn't make it any better for you, however, so feel free to continue your rant.