This makes me think of the red dwarf episode where they find a Time Machine 3 million years into deep space, and use it to go back to the 15th century. They get disappointed and think it failed because they are still in deep space, and Kryten says no, it worked, we are now in 15th century deep space.

They then work out that you need both a Time Machine and an instant space travel machine like the holly hop drive. Especially since everything in the universe is moving.

And so, like, aliens might very well care but can’t find the right intersection of time and space to actually get there. :)