Perfectionism often doesn’t need to be perfect for it to be there, and for you to suffer the consequences.
Good/decent/competent results can be dangerous (sometimes even “good enough” can be part of that as well).
Those labels can still make you spend too much time on something, get frustrated when you don’t get the results you want, and sacrifice other things in your life because of it.
The best definition of perfectionism I can formulate is this: The urge to push for a level of completion that exceeds your current abilities or circumstances.