I have no idea. I personally found it fun the first few times, but got bored of it for the same reason I got bored of Normal raiding: repeating a rotation over and over does not entice me. I knew people who liked LFR because it was a fun way to see big numbers popping up and killing big things, and even getting gear out of it. But the people I knew are irrelevant, of course.
How do you know "most MMO players will take the effective path to gear and not the 'like' path", though?
Do you have any actual data on it or is it just the usual stereotype? Because I certainly don't and I'm fairly sure the only way to get even close to that sort of information would be to compare how many people doing Heroic raids are also doing LFR. And that's something only Blizzard can do.