Completely agree with you on that. But there is a reason for it mentioned above.
Well, it's the most practical approach, without changing how raid content is designed entirely. Content reuse lets them justify investments in that content and it provides a larger progression chain.
lfr raiders can progress to normal modes (or flex now, I guess) just as normal can progress into heroic which is really important when you're talking about tiers lasting 6 months or more.
I'm not upset lfr exists, I just think raid encounters where coordination is removed just aren't very fun content. There's no real solution though, and content which isn't all that great is okay, they can get people to run it with the correct reward structure since in a mmorpg reward structures trump engaging content usually.
So on one hand, I think lfr is bad content, but on the other hand I think it's very necessary content and blizzard is probably doing the best they can with what they have to extend the content as much as they can to at least make it to the next tier (or at least the next tier's ptr).
I'm not living in some fantasy world where I think lfr will be (or even should be) removed from the game.