Big draw on the turn in big pot

[gobbledygeek]

Can someone explain why we would possibly want to bet the turn here? I think the following statements are most likely all true, no?

We are currently not the best hand.
The button is not going to raise a worse hand than ours (thus driving out better hands than ours and making us best).
Unless almost everyone calls we don't have an equity edge.
It is unlikely than a bet is going to free up an out that could make us best.

The last point might be the only debatable one?

Is it because a bet disguises our hand more so we really kill when we hit our draw? But if lots go to the river and our draw card comes up, maybe a villain won't put US on making our draw but they'll likely put SOMEONE on making their draw, so how does this really help?

GcluelessnoobG

ETA: Why is everyone so concerned about this turn checking thru (i.e. check if 95% sure button will bet for us)? This is not even close to being a disaster and is probably a lot more closer to what we'd like to happen...