If the galaxies are drifting farther apart at close to light speed then why are we bothering to try to go to other galaxies?
While what you say is true the distances involved are still so great the we have no concept of what it would take to get from our galaxy to Andromeda. Even if we could travel at .999C it would take millenia to go between these galaxies.That really depends on how close the galaxies are to each other. For example the galaxies in our local group are not receding, because gravity is strong enough to keep things together against the expansion. In fact our closest neighbour, Andromeda, is coming right at us. It is only on very large scales that gravity can't keep galaxies together anymore.