This entire post is just complaining how this incredibly easy career that requires no credentials, pays incredibly well, and is trivial to enter sucks because you need to deal with uncomfortable things every once in a while.
I'm not so sure about that. "Easy" isn't usually an attractive trait in employment. People by and large seem to need some kind of feeling of fulfillment to compel them to show up day in, day out. It might seem difficult to the neurodivergent who are disproportionately attracted to software engineering, but to most people it is simply uninteresting work.
Sure. We've all watched an increasing number of these people arrive in the software industry over the years. But they are not representative of everyone. Plenty of people can't force themselves out of bed in the morning for money alone. If they could, they'd be working in software.
> Jobs like factory workers and postal sorting etc. have high turnover because they offer neither interesting work nor good pay.
Manufacturing especially offers the illusion of interesting work. In fact, there is a whole political thing going on in the US right now trying to increase manufacturing job availability because of that illusion. I expect you are right that people are going to find out that it isn't what it seems, but so long as they believe it before they try it... Software, on the other hand, doesn't even try to pretend.