One of the greatest truth about life is the "whatever goes up, must come down rule"- Gravity. We might as well say, that the law of gravity negates progress. That's a NO. The law of gravity balances nature, imagine everyone on earth levitating at will(zero gravity).Fun? Weird right? 
Now, some hard truth about gravity. Did you know that astronauts age at 0.007seconds slower in space? Did you know that zero gravity endangers muscles and bone loss. The stress of Earth’s gravity is what keeps bones strong. In space, or any weightless environment, bones undergo little, if any, stress. Over time, the bones begin to deteriorate. Fun right?
Zero gravity also leads to acute dehydration.
With these evidence zero gravity doesn't sound so much like fun. At all.