I think there is a difference between "complex" and "complicated". It might require more effort to delve into the details of complexity, but to the extent that you can recognize where the effort needs to be applied to develop a reliable understanding, it's not "complicated" in the sense of being incomprehensible.

The author mentioned that "normal" people will often presume that someone who sounds complicated is smart, but I've seen the converse bias among smart people: they expect things to make sense, so when an explanation seems too convoluted, they tend to dismiss it as bullshit.