For me, that means I listen carefully for wisdom but have to speak louder when countering their occasional bullshit. Copying is considered a code smell by the likes of Fowler due to the problems it leads to. Also leads to bloat and performance issues. Better to cleanly, simply package up reusable solutions to problems like JSON or protocols (eg HTTP) then just keep importing the same one. You get lean apps plus a greater understanding of what they're doing.

And so does the person you hire down the line to extend that app. Never forget that part when talking copying and tweaking code. :)