Something that the article did not mention: Short sellers reduce volatility and lead to smaller drops. Why? Because having shorters guarantees that you will have a buyer for a stock that is falling. To exit a short trade you need to purchase shares. This helps prevent stocks from falling too low out of panic or undervaluation, benefiting people who are long the stock.
The negative reputation comes mainly from the cases where short selling is used for market manipulation like coordinated bear raids. If the market regulators are awake, this should not be a reason to oppose short selling in general.