I'd strongly agree that it's economically harmful for people to collect rents without providing any new value, by accident of being in the right place.
Problematic, but murkier, is the case where someone happens to own a mask factory and was previously happy to sell at $0.1, sees that supply is down and demand up, and raises prices to $1. The factory owner is capturing a lot of the surplus, and one could argue this is basically a rent for being in the right business at the right time rather than any sort of economic incentive to act efficiently. But a capitalist would argue this is reaping the rewards of foresight to invest in mask factories, and the chance of this event helped price and incentivize that investment in the first place. Anyway, on the other side of the market, it's not clear that high prices are helping allocate efficiently if places that need supplies most do not necessarily have the most money available to bid high.
The article does get into some arguments about the most interesting case, where actual changes to production and distribution happen because of the crisis and prices' roles in mediating these changes. I like some of what the article says here, but it more argues that the current system is a problem than price-caps are a good solution -- and they have to be combined with other more draconian measures like seizing and redirecting supplies. Maybe a better solution is the government subsidizing all supply purchases massively, and letting prices go wild. (This wouldn't work in isolation either though, we still need some method for mediating between places who gets what.)