The junior engineer will grow into a senior engineer

Not as fast as models get better.

And not at all for you, because you're unlikely to retain them for long. Which makes this immaterial - AI or human, you're only going to delegate to n00bs.

(This is distinct from the question of which benefits society more, which is a separate discussion.)

> The junior engineer will grow into a senior engineer

And then quit after accepting a new job that pays them their modified value, because tech companies are particularly bad at proactive retention.

Which has nothing to do with the argument you're responding to.

Only if you take the argument entirely out of context.

.. and because the job and environment weren't that pleasant or rewarding to offset that delta in income offered elsewhere at an equally drab employer

And then they get their own junior engineers and you get fresh new junior engineers.