It is not strange.
Protecting something loved and favored is good. Remember Planescape. It is still supported by fans to this day. You may think that comparing setting to one element of it is not good example, but would Realms be fun if some elements never existed?
Some people think otherwise when it comes to fantastical things, not that I care much though...
I do not say I support spite 4th edition gets though. Whatever they did, people worked on this for a long time. It is not something one pay check can satisfy.
Still, it is not so far from reality that this forum was one of bricks to create statement some men could not ignore anymore.
On this point I only partly agree with you. I do not follow the 4e Realms, however I read around that much effort has been put in them recently (novels, additional lore etc...) to improve and reintegrate what was lost. This is positive, of course.
However we have to consider that while 4e FR is the product of a considerable quantity of work, how it was in its early days, it basically destroyed much of what people built in many years by removing a lot of concepts with great potential from the setting (and adding nothing to take their place) and retconning the crap out of it, only for the sake of streamlining and simplifying (and the matter about the drow is just an example).
So it's a double sided problem. They need to reconcile the old with the new or the current Realms will continue to hold very little interest, at least to me.