Well I can see trying to get my view across has failed and since all I get is hostility trying to have a discussion I won't bother.
It's not this at all. I understand your point perfectly. Then again, you haven't been talking to me, so I'm just going to step in and offer this:
I think you underestimate the value of the resources that are available in space. For practical terms, they are unlimited. Materials on Earth are very limited.
Gold, Platinum, http://en.wikipedia.org/wiki/Rare_earth_element, Hydrogen, and even Water are all very scarce compared to how badly we like to use them.
For most of these, you can't just start a random mine on Earth in order to get some more. We've found the sources for just about all of them, and we're starting to realize that we will eventually run out. In space, though, these things exist in abundance. Infinite abundance. Most of the asteroids in the solar system contain more gold than humans have ever mined in their entire history.
All of it.Taking into account how useful gold is in making electronics, or how useful platinum is in engineering, we would
love to double our supply of it.
So that's all my opinion is. You say we should spend our time and efforts on things that are worthwhile. I completely agree with you.
I think mining the solar system is very, very worthwhile. Not just to make some king pin filthy rich, mind you, but because I can see the very real benefits to industry, science, and technology here for the rest of us if someone gets out there and does it.