I always thought that the book made the dark forest hypothesis look really bad.

Because basically the main premise is totally absurd. And it shows that you need an absurd premise to make the "hostile invasion alien" story work in any way.

I have yet to read a sensible alien invasion narrative. The only one was "War of the worlds" and that's only because at the time life on mars was plausible. Currently with a lifeless solar system, aside from earth and the need to cross unimaginable distances to reach earth, there is just no plausible motivation to invade earth. We have nothing to make it worth the trouble basically.