This is such a massive oversimplification as to be ridiculous, and it's so rampant in these discussions. Even if every person working a factory floor job was capable of doing this: They aren't supported whatsoever through such a transition, meaning minimum 2 years of living on basically savings, something most people who know "electronics and coding" would have a hard time doing, let alone someone on the poverty line, and the few who manage to do it, say five, can now oversee all four hundred machines that replaced them and their former coworkers. And all of that isn't even going into the fact that they machines they'd be maintaining in your ideal dream world are probably an ocean away being maintained by people who know that skillset already working for slave wages.

Yes, though that doesn't fix "the problem", only puts you on the better side of it.

When these robots arrive, you will most likely have plug and play electronics inside. There will be no user serviceable parts inside.

Without a fair amount of equipment there isn't that much that's user serviceable in modern electronics.

I was mulling that today as I worked on C# code to talk to a Sony camera over WiFi via JSON-RPC.

The fact that this unit has a wireless adapter, an entire TCP/IP stack and a webserver that can parse/generate JSON.

Basically the camera has processing power hundreds likely thousands of times more powerful than my PC and if it breaks there isn't anything on it that would likely be fixable with a soldering iron.