Then they become gatekeepers, refusing to allow anything on their platform unless it conforms to their ideal vision. The catch is that their vision won’t be ready to use for 6-12 months, so you can’t deploy. Now your biggest problems aren’t engineering, it’s constant politicking to get around the platform team.
Add to this the concept of “architects” who don’t code but jump from team to team critiquing their work and you have a recipe for getting nothing done. One half of engineering is coding and trying to ship, and the other half of engineering is gate keeping and trying to prevent anyone from shipping