So I entirely believed this advice, completely and absolutely. And then I started my current project.

I'm working on a thing now which no one believes is possible in the AI space (and to be honest I didn't either).

So I built a tech demo which proved to myself that it really does work.

Now I do the "I'm doing XXXX", get the cynical "yeah right" look, but the idea is interesting enough that people are prepared to see the 30 second demo.

The demo is pretty cool.

After the demo I've had people ask if they can invest, without me asking, and I think every person I've demoed to thinks they would either buy it or know someone who would.

So I'd caution that not all advice is correct in every situation.