> Forgive me if this is overly blunt, but this is such a novice/junior mindset.

Unfortunately the reality is there are far more applications written (not just today but for many years now) by developer teams that will include a dozen dependencies with zero code review because feature XYZ will get done in a few days instead of a few weeks.

And yes, that often comes back to bite the team (mostly in terms of maintenance burden down the road, leading to another full rebuild), but it usually doesn't affect the programmers who are making the decisions, or the project managers who ship the first version.