Not to be pedantic, but it was technically impossible to land a rocket booster on a barge. SpaceX did the R&D to make it happen. They made it technically feasible by developing the technology for a task that was previously not technically feasible.
The article started with a biased premise and then worked to prove that.
It's a company running in the red. Unfortunately EBITDA is still negative (much less earnings). The jury is still out on whether or not SpaceX's approach is in fact commercially viable.
I know first hand this statement is absolutely false. In fact, a GNC engineer in a Large Aerospace Organization That You Would Recognize asserted to me that a booster landing on a barge is impossible. And strangely, he said it just a few weeks before it was accomplished and after SpaceX had demonstrated land landing.