Exactly, just because you can vibe code an HTML sanitizer or an operation system, doesn't mean that you should..

And its the same reason you'd rather have a SaaS vendor, than asking an agent why the cloud bill keeps climbing and then have to debate the impact of delete such and such VMs or databases that nobody knows what do :)

You also don't ask your agent to start from assembly.

Things you can get upfront as libraries or services are things you and your agent don't have to worry about.

I'm not even sure there is anything new here, just that we have a capability jump with LLMs, you'll probably prefer spending it on building features, not replacing vendors (unless they are crazy expensive).