is accessory core necessary for powerlifters!!!!!!!!!

I like this question hopefully this will get some attention and educated opinions. so I was arguing with my girl and her dad today about this they believe it's necessary I say other wise. my belief is along the line of heavy deads squats and bench work the core efficiently enough to need now extra focus on abs I was doing this wen I deadlifted 495 I did it at 600+ and will continue to do it on my way to 700 and 800 and so on. without rambling anymore what r you guys opinions on this topic?

is accessory core necessary for powerlifters!!!!!!!!!