It really doesn't matter what the universe REALLY is.
We have to live in, and deal with, the universe we perceive.
There may be an objective reality, but we exist in a purely subjective one. Everything we know about the universe is learned through the imperfect and limited data collection of our senses, and processed by our reason and analysis (however limited and imperfect that may be). Even our memory is of questionable accuracy and value.
As Carl Sagan once put it, if you're bitten by a poisonous snake while exploring the jungle, you may have no choice but to accept the local witch doctor's advice. He's the only one around with any relevant experience.