Yes I've long been aware that gravity is a theory, no problem. But that's only a third of the issue - "we don't currently know" and "we haven't yet figured out how..." is a problem if people are going to insist that science has come up with THE definitive answer.

If they actually knew already knew HOW it all began then why build the Hadron Collider for a total cost of about $4.75 billion and an annual ongoing cost of about $1 billion per year?

Sure, actual science is wonderful, at 10p or even billions of dollars, guesswork is just guesswork.