I disagree. I'm sure that, if we really wanted to, we could put a person onto Mars. I don't think we have the ability to send someone & retrieve them, or for th

I disagree. I'm sure that, if we really wanted to, we could put a person onto Mars. I don't think we have the ability to send someone & retrieve them, or for them to fend for themselves on the surface. So this is a bit like saying we have the technology to explore the inside of a volcano because we can jump into one. It's not really the proposition people are talking about when they say "go to Mars". But I agree that it's actually a generous comparison to self driving cars. After all, we do occasionally send machines to Mars, and they work quite well.