If someone could show that there is no way for those forces/laws to have been otherwise, that would mean that every possible universe would be conducive to life

If someone could show that there is no way for those forces/laws to have been otherwise, that would mean that every possible universe would be conducive to life, and that would remove the need for infinite universes and for god in explaining how this universe is conducive to life. It still leaves an existential question, of course, but it changes the metaphysics conversation in the same way that the discovery of other suns and worlds did for the initial argument. Well, it's more like, "something eternal exists outside of the universe," or "there are infinite universes," but in general, yeah. Of course, that argument doesn't happen in a vacuum. There are relevant arguments about ethics, evil, personhood, etc. that come to bear on the discussion as well.