I think it's good that the status quo got mixed up a bit. The introverts don't have to defend themselves or feel like outsiders quite so much.
This article aligns stay-at-home-ness with "fear," "a fettered life," "hardly worth living" and says "retreating ... is an ultimately selfish choice." I believe that's a bit of a poor take. Plenty of people live rich, productive, fulfilling and engaged lives that don't especially involve a lot of interactions with other people.
This author is clearly someone whose habits were impinged by the changes brought on by the pandemic ("... naturally outgoing people – this writer included – have found it that bit harder to get their friends out of the house."), but is that the end of the world?
It almost feels like the author is eager to get back to what they are comfortable with, at the expense of (by their numbers) 1/3 of other people's lifestyles. It's almost like they are the ones afraid of this change — like they are the selfish ones.
But I don't really go for the whole us-vs-them approach at all. It has been a great (if forced) learning experience. Some people got to discover happiness they didn't know before. Other people felt the loss of something they took for granted. Perhaps we should share these lessons with each other and bring some balance and increased awareness, rather than pointing fingers and taking sides.