The machinist is not the only one.
I used to watch a utube fabrication expert who went on-and-on about the inherent risk of hooks on the top of a bucket, for the same reason you state: objects flying back at you. He documented how a hook placed inside the bucket was a choice location. He installed in the center of the back, a very strong location. Weld-on or bolt-on with a plate behind are purchase options. The earlier photo of the yellow Payloader bucket is a good example of inside-the-bucket protection.
As for lifting power, on one of my buckets, I welded a hook on the rear of the bucket next to, but outside of, the connecting pins so a chain could be hung down from the hook. Its more lifting force.
Oh, and I always paint mine, using the matching OEM color. It looks so much better and is durable. There once was a time I did not paint, but realized that I do like a more professional, finished look.