No, we’re saying that both the short seller and person who lends the shares can be right and come out making a profit, because they’re holding the shares for vastly different time periods. The long term investor is trying to smooth out the fluctuations in share price by holding them for a long period, the hedge fund is trying to capitalise on those fluctuations.
Yes, if the short seller is right then the original investor lost out during that short spell… Their asset is worth less today than it was yesterday.
But they might make their money back in dividends over the next 10 years, they could sell in 10 years time when GameStop is the next Amazon. That’s the basis they’re working on.