Look, I'm the first to consider going against the received wisdom when there is a reasonable argument to listen to. If someone will offer a coherent explanation of why short selling, in principle (apart from credit, suitability and enforcement issues), is bad for the markets or the economy generally, I'll listen to it. I have yet to hear it made.
Short selling is necessary. But not because a concensus of economists say that it is. It's just common business sense.