yeah but Not Invented Here is also a thing. Experienced devs also have Their Way Of Doing Things and if the code doesn't fit that, then it's "garbage" and needs to be refactored.

I've seen at least two perfectly good code bases get refactored badly because the dev didn't understand how they worked, or they were in a language the dev didn't want to work in [0].

[0] One of them was me, and in my defence it was PHP.