I'm surprised the previous responders here seem so negative and pessimistic.
Yes, previous people have been irresponsible and selfish, but that doesn't mean we're not learning. Look at how much more conscientious we have become about our environment now, with "green" technology, Earth Days, voluntary cleanups, etc.
And, whether we like it or not, humanity will eventually--albeit in several centuries (I hope)--realize we need to become spacefarers because our sun is running out of fuel and/or acting erratically.
So, I think Mr. Bolden is trying to take positive
steps toward space exploration and colonization in a practical, realistic way.