I think you're misunderstanding my point - I'm not saying that the workplace is the only place that you can develop social skills or that we should view the workplace as like.. the best or primary source of community or anything like that. What I'm saying is that in a world where traditional ways of finding community - local involvement, religious involvement, etc are all on the decline, the workplace is the only place left that has any semblance of community for adults in America. It's not ideal, and I agree that you should not look to your employer as a source of good. The best workplaces care about you and respect you as a person, but at the end of the day they have to place the needs of the business over any one employee's personal needs.
I'm also not really talking about social skills in the sense of the ability to make friends, or to interact with people you know in social situations. Work really should not be the place you learn that stuff. I'm talking about social skills in the sense of getting things done with other people while working towards a common goal despite not sharing a personal connection at least at first. That is the core concept that makes every society work and it is something you can learn at work. It's also something you can learn at school, military service, etc. But it's very different from the ability to make or keep friends with likeminded people who are in your social group.
I'm just imagining the world if we go to a long term full remote environment. If you're a kid growing up in that world, how do you meet people outside your family, if your family isn't involved in say a church or some other community organization? Maybe if school is still in person, you meet someone at school? When and how do you ever meet anyone with differing views or life experience as an adult? For most people, the natural tendency is to avoid people who aren't like themselves. What does the world look like? Everyone gets everything delivered to their house? Maybe retail stays "in person"? During the worst of the pandemic, we all needed to stay home but that was temporary - imagine if that had gone on for 20 years. There are measurable negative effects on society from 1-2 years of many things being fully remote. I'm imagining a world where most people sit at home, talk to their family and maybe a few friends they know in person, and spend their time online in echo chambers talking about how everyone else in the world is terrible.
My ideal working situation is most people are hybrid (all employees in office on the same specific days each week) with flexibility to go full remote for say a few weeks or month at a time a time or two a year to allow a working vacation, etc. Some people can go full remote based on their personality/life situation/job needs, and some people are full in person based on the needs of the job.