Very regularly I'd hear "Code duplication is fine, do not use an abstraction here". What he meant was "In this case the abstraction might be incorrect. Use abstractions only when they actually relate to business logic, not just because two pieces of code happen to look the same". Unfortunately, while that was very obvious to him, to new developers to the team (like me) it sounded like "Do NOT use abstractions, they are evil". Over the years I developed a habit of never thinking about abstractions because they are evil. I duplicated code that should have been abstracted and today we pay the maintenance cost for that.
tl;dr: Experienced folks, be careful when you caution your peers against abstractions. Be very explicit and assertive that they _CAN_ be used correctly and one shouldn't avoid them.