The difference between technician and programmer isn't about predictability, it's about novelty.
The technician has to know the system well enough to respond correctly (or even proactively with preventive maintenance, etc.) to unpredictable problems that are "in the book".
The programmer by definition solves novel problems.
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edit to add: Beware folks who look down on technicians. It's a kind of "code smell" of the mind.
Judging by comments here and elsewhere, programmers look down on all sorts of other adjacent professions: business types, testers, managers, salespeople, etc. If it's a "code smell", we all positively reek of it to high heaven.
My thesis is that this is primarily because the normals picked on the nerds up until they realized there was a lot of money to be made if you're the right kind of nerdy (or if you can fake it), around the time of the Dot Com Boom. There's residual resentment there.
Also, people who are otherwise intelligent but unwilling to learn to program computers themselves seem stupid to the dedicated computer nerd, no matter how intelligent they are.
I'm not making excuses, these are just theories about why we nerds can be so ... arrogant?
It means that you don't need a technician at all where the problem is completely automatable.
In the original blog post, the developer who was automated away was of that type - adding HTTP API endpoints from protobuf definitions if I read correctly.
It seems that you and the original blog post only disagree about what the word "technician" means (and I think I'm on "your side" with the definition). But the original blog post really talks about automating away developers who do things like writing HTTP API endpoints from protocol buffer definitions - with that I totally agree with.
The technician has to know the system well enough to respond correctly (or even proactively with preventive maintenance, etc.) to unpredictable problems that are "in the book".
The programmer by definition solves novel problems.
- - - -
edit to add: Beware folks who look down on technicians. It's a kind of "code smell" of the mind.