[bjourne]

In this context, "not technical enough" means "not being able to accurately estimate technical costs." I posit that there is a correlation between being technical and being able to estimate technical costs:

One example I have seen a lot is the "exactly as I want it" design. What that means is foregoing using any standard web components (like Bootstrap, jqueryUI, ...) because they don't work exactly as the product designer wants, so you have to build something from scratch. Then you run out of time because building a complex web site without relying on any ready-made components is a lot of work, leaving the web site in a decidedly half-assed state.

As you can see, in my opinion "being technical" is not only about programming. It is also about YAGNI, being lazy and very much being a realistic pessimist.