We could go on and on with that debate, they claim, it provides "liquidity to the stock" the reality of what it does is bankrupts companies if they are not on solid footing, frankly Im glad Mike raised capital when he did and we should all be applauding him, now the whole industry is under short attack because of a few garbage companies are getting shut down, well thats not us, all our filings line up and our CEO doesn't have to pump the media PRs, because we are real, so the basic answer to your question is shorting exists because it is lucrative for the warehouses, they can charge a percentage to loan out your shares if you have a margin account and they then are basically used against you until the short seller covers usually at a much lower price.....
I set a GTC order out because I do not believe in short selling unless your hedging your actual owned position, on larger exchangesyou could just write covered calls, so basically I wouldn't even short then.
Basically greed.