Human beings are explorers by nature, and this is one of the biggest scientific explorations ever. I've got some sympathy with your views OF but I don't agree. That viewpoint can always be applied to advanced speculative research, but if we did so we would never make those amazing technical advances which do eventually benefit the ordinary people; life would be very dull, if worthy, and we would probably all be poorer than we are now.
And as for the extremely remote possibility of devastating black holes resulting from the experiment, I'm totally in agreement with Dave. Extensive risk assessments have been done by scientists and engineers, not politicians. The prophets of doom seem to be the kind of people who would stop us doing anything interesting just in case something goes wrong. And I suspect that in this case, a lot of the opposition comes from the USA and is inspired by the fact that Europe is doing something bigger and better than they've been able to do.