Is the biggest challenge in building AI Automation artificial intelligence or connecting all services together in a stable way?

Today I finished the first working version of an AI workflow I've been building in n8n.

The goal sounds simple:

Fill in a form → generate a LinkedIn post → generate a matching image → publish it → send a copy by email.

In reality, most of my time wasn't spent on prompting.

It was spent debugging API connections and making sure each service finished before the next one started.

After about an hour of troubleshooting, everything finally worked end to end.

That reminded me of something:

Building AI systems is often less about AI itself and more about making multiple independent systems work together reliably.

Now that the first version works, the next step is improving it and adding support for more social platforms.