You mean to live without the practical benefits of scientific theories that themselves haven't been proven yet. Relativity hasn't been proven (and Quantum people think it may be completely false), yet millions get their energy from nuclear power. A theory need not be proven in order to be useful.
The worst part about your misunderstanding of science is that if you had your way, all science would stop. We'd declare a theory "proven" and thus all need for further research would stop -- why work more when it's been proven? The scientific method never proves theories, and the work of discovery always continues, refining, replacing, correcting, but never proving.
Wrong, the applications of the theory prove the theory correct. Everything you see around you is proof, practical proof of some scientific theory. You think that if the theory of gravity was false we could have made it to the moon by using it? Of course not. As I said, you set a ridiculous standard of proof in order to excuse the failures of your theory.
Further, even by your own admission above, a scientific theory needs be useful. What benefits to mankind has the theory of evolution provided?