The Mack on the throne in the OP would bug me; too far out of whack. But the 1952 Jackie is a beautiful card. I like qualifiers just because they can get me a really nice card with one identified issue to it at a price that is often a small fraction of the cost of an unqualified one. I recently picked up this card:
I know it is FB and my scan is not great but bear with me. A PSA 9 Brown sells for about $1,000; way out of my comfort zone. I picked up this one for $110. I've also picked up other qualified 9s recently for my collection, same idea. Spectacular cards with centering issues priced like lower to midgrade cards. My favorites are MC qualified cards with perfect fronts and miscut
backs. Who cares about the back of a Topps card; half the time you can't read the blue or green ink on gray cardboard anyway.