So, the US/NSF is like "we have a bunch of money to do science, but it has to be at the south pole". People like Halzen who had a crazy idea go to NSF and say how can I get a bunch of money to do this. NSF says, we don't have that kind of money in our physics budget, but if you were to do it at the southpole we could fund it.
Also, we've been shipping by water much longer than we've been trucking things on wheels, because the tech is easier: get on floaty wood and paddle.