how much polyunsaturated fat is okay?

I have a lot of heart attacks in my family and heart disease
I wanted to get a discussion going on poly unsaturated fats which is on paper considered a healthy fat but in reality is it?
I’ve talked to some cardiologists and they say that you should avoid it as they can lead to heart attacks. It’s in a lot of the protein foods that we’re eating as bodybuilders. What kind of tips and advice can you give me on this?