Modal realism says "all possible worlds are as real as the actual world" (Wikipedia). In different possible worlds there are different laws of physics, almost all of which don't allow for life. In some proportion of those where they do allow for life, there's no life anyway (it seems to be rare in our universe). In some proportion of universes with life, there is no sentient life...

Without sentient life, there's no knowledge, so no shore. No shore means no land.