Why don't they just tell us what we can actually expect??
Because people will whine and whinge and make silly suggestions that make no sense, they'll pound their chests complaining that the idea wasn't what they were promised in
Alpha, then post a hissy fit rage quit, only to come back a day later back in another moaning rut about another topic.
A solid percentage of this community are, simply put, immature babies who can't control themselves. If they don't get their way they stomp their feet, scream, and hold their breath until they get their way.
If the community at large could act in a responsible and respectable manner, maybe Frontier would engage with us a little more. However, given the current state of the forums, it's like a Whack-a-mole game when new ideas are presented.