That's easy for Buzz to say. Wonder how he'd have felt if they said that when they sent him to moon! I think we could eventually put up permanent residence on Mars but there's a lot to contend with first before it becomes a life long adventure. Also, when the Europeans came to America they had something that Mars lacks: Natural Resources and other humans living here first.
Though Aldrin makes a case for it, at this point, we need to concentrate on getting there and establishing a base of operations before we set up an old-astronaut retirement community. Rotating workers into and out of a Mars base would make more sense with tours of duty lasting from 2 – 5 years instead of say, forever.
Though I did agree on one ideological point Aldrin made. While the Space Shuttle and the International Space Station (ISS) have probably provided some scientific and even commercial value, they “were a disappointment” as the article says.
In the story Aldrin is quoted as saying that the shuttle “has not lived up to its expectations, neither has the space station.”