Depends on your herd and your philosophy of breeding AND the philosophy of the people you get your rabbits from.
I am personally a very hard culler. Look wrong at me (in a health perspective way) and you'll never be bred...and if you are a kit just grown big enough to become food. If I won't breed you that means I won't sell you and that means you become food.
Means that now I have a herd where I can feed them anything and I don't get gut issues. unexpected noise and no one shuts down. etc. etc.
It's HARD bringing in new stock and having to fight against latent illnesses or lack of hardiness. And often means I'm starting from scratch with a new line. Too many people coddle rabbits.
Doesn't matter the issue for me: eyes (nestbox eye included), teeth, breeding, poor momma, mean bucks, bad temperament, etc. If I don't want it in my herd I won't pass it along to yours.
Took me a while to really get a grip on what an old time rabbit breeder told me once... Breed for what you want. If you don't want it, don't expect others to either and cull it out. I've gotten stricter and smarter over the years.