You go from focusing on executing a well defined strict set of tasks that closely fit your brag worthy skills to pondering a partially defined set of fuzzy "more important" goals that poorly fit your skills while unsure if your noob input would either make you look like an idiot or be very valuable.

The problem is that it's very hard to convey subtlety & uncertainty. Sometimes the truth is "we may go in one of these 3 ways so we have to cover our bases to be able to go in either once we do know" but people (especially programmers) want to hear "we will do exactly x and it will not change in the short term".

EDIT: I think this is a good way of phrasing it https://news.ycombinator.com/item?id=32630650