> But installing a program, reading documentation, then configuring the right settings, confirming it is doing what you want it to do, find out that's something wrong, going back to the docs... all of that can be automated.

It certainly can be automated. What you gain in productivity you loose in proficiency and self-reliance since you're depending on others, an artificial 'other' in this case but it is more or less like asking your nerdy friend to install that Linux thing for you. When it breaks you'll have to ask that nerdy friend again, or that agent again in this case. When the agent is unavailable it is just as if the nerdy friend went on holiday leaving you to fend for yourself.

You may be OK with this dependency but it is good to realise it exists. Could you still fix things after having used agents for a few months or years? Probably not, at least not without you needing to read all that documentation, try and test, fail, go back to the documentation and try again until you get it to work.