> There are also SE jobs where you have to be everything. Tweaking servers, calling customers, designing and implementing backends, some frontend work, maybe even helping out with the company website. Meeting with CEOs of partnering companies. I don't see typical blue collar workers doing well in that sort of situations.

Generally I don't know, I certainly did fine in that type of environment (has been most of my career) - I don't think it's that dis-similar to a contractor (construction not soft-eng) who has to essentially run their own business and do similar types of things.

Some of the smartest (not necessarily academically) people I've worked with where in traditionally "blue collar" roles - most developers aren't that special or that smart (and I include myself in this) - at best we have an aptitude for computers that others lack.