"Let's go to Mars" is a lot more ominous than it used to be, knowing who will be in charge of such a venture and their attitudes on, idk, everything involving society.

The push to the Moon was a national project that resulted from the vision of an elected leader with at least some controls on his power, and never promised to create a society beyond the authorities of Earth. Musk's push to Mars is the opposite.

The ISS is old and is only getting older, but if it means having a place to do some science that would otherwise not be done, and draining funds that would otherwise be used by an ethically-questionable human being to make himself the emperor of Mars... keep it in orbit.