Why destroy Laketown's bridge?

[Sauron the White]

I have no problem at all with anyone presenting ideas or theories or suppositions or assumptions. Until they are presented as facts when they are otherwise.

I did not edit out the First, second , third points of Macaulre but presented them complete. While he was talking about landing on the docks, the same reasoning could have applied also Smaug being anywhere near water where he could misstep. That was my point which I think was a fair one.

If Smaug landed on shore, and walked across the big bridge, is it not realistic to expect that he would be met with hostle action from some of the townspeople trying to stop him? And could not that hostile attack also cause the dragon to "misstep" on that bridge and fall into the very water that he is suppose to fear? I think that is reasonable and that was my point.