Yeah, some of it has to be...string theory, loop quantum gravity there are a lot of theories waiting for a method of testing.

There is a far amount of mathematics behind these theories which give them some validity so I wouldn't say it is guessing.

It's trying to fit observation to an explanation. Without people doing this kind of thing we wouldn't live in the modern world.

We need theoretical physics to enable humanity to progress as a species. If we don't eventually get off this rock we are doomed to eventually die on it.

Some may be satisfied with the idea that it doesn't matter as they are personally going to exist forever in some palace, eating wonderful no calorie cake whilst being in permanent ecstasy from the experience of being with God.

For the rest of us, I'm sure they are somewhat happy that some of the brightest amongst us are actively trying to progress life down here on the ground....without us having to sing songs at them.

I wasn't trying to dis' science,I love it. I was just trying to be realistic. It's theoretical science's job to push the boundaries and scientists are employed to make it happen. They have a pressure on them to come up with new theories. We must judge their output accordingly.