Liquidity is not usually the primary benefit. That’s usually the argument for high frequency trading firms.
It's almost like they forgot who Christian Bale portrayed in that movie.
Being on the short side isn't a problem per se. Having 140% short float is.
There's a term, 'Zombie Corporations' for businesses that are both stagnant and also generally aren't very beloved by their customers, but are still able to stay in business due to some localized monopolistic factors. Those kinds of companies exist in every sector and still 'make money' but they're usually the kind of companies short sellers target.
Getting rid of them is not some fundamental ill of society - yes it could in theory make some people lose their jobs, but it also keeps the economy going. If this kind of things didn't happen it would be impossible for new businesses to come up and with those new businesses new job creation, new ideas, etc.
Suppose you see an ongoing pump-n-dump---sketchy pseudoinformation being passed around to raise the price of a stock someone has already bought, so they can sell later. If you short the stock, you act to reduce the price excursion and potentially help the eventual victims.
Suppose it's not a pump-n-dump, but rather "irrational exuberance"---people buying a stock and raising the share price for non-economic reasons. Short selling applies alternate pressure on the stock price, reducing the effects of a subsequent correction.
Given more capital and a reasonable amount of time, the short sellers in this instance will be correct. The value of the GameStop stock using commonly accepted valuation methods of our day is much lower than $300 or even $100 per share. Unfortunately brick-and-mortar companies with declining revenue and no visible growth prospects are valued differently than high flying tech stocks. Keep in mind that I understand the rules of the game dictate that shorts can be squeezed and the share does not have to trade at the commonly accepted valuation.
short sellers have also discovered a lot of fraud companies because they have a monetary incentive
and for society as a whole, we should want the markets to price things accurately. things that are overpriced just means capital that isn’t being used somewhere else efficiently
it may seem ugly but capitalism is creative destruction. it’s an evolutionary system, the weak need to die so the strong can thrive