Why destroy Laketown's bridge?

[Sauron the White]

here is the description by JRRT in the text

A great bridge made of wood ran out to where on huge piles made of forest trees was built a busy wooden town, not a town of elves but of Men, who still dared to dwell here under the shadow of the distant dragonmountain.

Macaluare asks

About the picture: If it wouldn't show something which is contradicting to the book, nobody would be willing to discard it. You seem to try to use the picture in order to disprove the book, which is - I'm sorry - ridiculous.

You claim that the picture contradicts the text. Could you take the above description by JRRT and explain where it contradicts what he shows in the picture because I see no such problem or difficulty.

from Rikae

Just one question (and I think I already asked it and didn't get an answer) - if this was the case, how is the fact that his enemies are now "on an island in deep water too deep and dark and cool for his liking" relevant? Why did Tolkien include that in the second half of the sentence, according to your theory?

I have no "theory" about what that passage means.

[Rikae]

Originally Posted by Sauron the White

You claim that the picture contradicts the text. Could you take the above description by JRRT and explain where it contradicts what he shows in the picture because I see no such problem or difficulty.

That, as you probably well know, is not the part of the text it appears to contradict (that part being the destruction of the bridge in little time).

I have no "theory" about what that passage means.

So you argue against our explanation of the passage by explaining the first part and ignoring the second, about which you have "no 'theory'". Thank you for making that clear.
(Or are you, with the scare quotes, suggesting that you have no 'theory', but rather access to some sort of "fact" about why Tolkien brought up the issue of plunging into the water?)