It does seem like a lot of money, and a lot of fuel and resources to give a few people some jollies.
I think space tourism has a role, but I'd prefer to see it working side by side with necessary work rather than just "cos".
Or spend the money giving public access to telescopes with people to explain the wonders of what they are seeing.
That said, I do confess to being maybe too focused on "useful"? A few years back one module on my Astronomy degree course for a course assessment essay I won a prize of observing time on the Liverpool Telescope (remote 2 m scope in the Canaries) and rather than me choosing something of personal interest (likely a Globular Cluster) where my time would have served no useful purpose I told the University to give the time to a researcher of their choice for their research (eg somebody whose bid for time was to be not granted), put to resource to use.
Ian
Edit: To clarify, I don't have an Astronomy degree but for a time was doing different modules on UCLAN and Liverpool JMU Astronomy degree courses.