Mav it's not that we can't manage your first point with the technology, it's that there's far too little political backing. There's also way too much red tape inertia in Nasa. Not enough tolerance for risk in Nasa, the govt, and from the public. It's unrealistic to assume we can do so much new development in space without breaking some eggs along the way.
We could be on Mars right now, if the Apollo momentum had continued.
Mainly due to the fact that just like the American initail stabs at the Gemini & Mercury projects there were costly problems. Some test rockets blew up on the pad. America sadly lost 3 brave sons on Apollo 1 that died in a fire on the gantry during a practice session.
I remember reading books as a kid saying "we" (America) would not only land a man on Mars before 2000, but we would have a permant colony there.
Things don't always work as planned.
America has also had costly mishaps in our Mars program. One probe got all the way to Mars, then crashed into it. Flush all that time, effort, and tax money down the drain. That's why they have been so careful with this present one. Yes we've "broken eggs" along the way and they haven't been cheap.
Please don't make this a personal Moot vs ROX issue, because it's not intended to be, but the "we" you speak of is the American Taxpayer.
The Apollo series went back with a few later lunar landings. At the time, the scientists here figured they had enough moon rocks and moon dust to keep them busy for awhile and they were right. And then...there were NASA budget cuts by congress.
The joint US/Soyuz mission was a huge initiation to international cooperation in space. Skylab was a decent effort, and now the ISS is the best example so far. It's GREAT to see other countries join in the effort...but by far the biggest chunk of the price tag is paid by the American taxpayer, and since it is, there are politics to deal with.
The US might enjoy those in the international community to help throw in a bigger slice of the funding to get the benifits of whatever scientific knowledge there is to be had...not to mention the national pride of having one of their own be part of the ISS missions.
I believe we will go to Mars in the next 20 years, but the technology to get a big enough solid rocket booster there on the short haul, and get the crew home on either the long or short hauls just isn't there yet. Maybe the ISS and new fuel possibilities will get there.
ROX
ROX