Education and retraining are useful, but only if there are jobs for people to do with that education and skillset afterward. Otherwise it's largely pointless, and serves primarily to make the unemployment stats look better than they really are.
I don't believe that education is the root problem here. The root problem is the vast scale of job losses. Education can benefit some of the people affected, who can then move to other jobs and careers. But it can't help the majority if the opportunities simply don't exist. And I think that harsh reality isn't properly acknowledged. A vast number of people have been essentially abandoned without hope. The alternative jobs and careers simply don't require enough people to make up for the losses.
(I'm writing this from the UK, but there are a lot of parallels in the massive industrial decline here as well, and I don't think any good long-term solution has been found here yet either.)