There's no business case for Mars sample return, for instance.
You are far too short-sighted. Think about this: War profiteers make trillions, arguably the largest economy is that of death. Also, It takes a division of people to cause a war.
Space is the greatest divider of all. You think pork spending is rife now? Just wait till the folks you're fighting are ON ANOTHER PLANET. Put some people on the moon or Mars... It will be made to pay off, big time.
"no business" -- How quaint. You are now aware that oil is expensive and rare, and solar cheap and plentiful. Excuses will be made for profiteers, the material is of little concern. I can almost hear it now: "They're destroying the historic heritage of mankind by defiling the red planet with their human contaminates! The potential scientific samples lost are irreplaceable and invaluable! This means war!" See, you don't even have to return them to extract a profit from the samples.
Your planetary concerns are ridiculously naive. Your moronic priorities are a disgrace to all sentient beings who share them. You WILL become EXTINCT. Having multiple self sustaining extraplanetary footholds of life is the only way to reduce the chance of your extinction, earthling. You think interstellar politics is something? Just wait till the Andromeda merger. Galactic Politics will blow your ever crapping minds.