They aren't as restrictive for head/eye placement behind them which seems to make it quicker/easier to pick up the reticle. It's not so much a field...
Here are some pics of my Girsan slide (bottom) compared to what CHPWS normally does. Note how my plate is located back an eighth of an inch or more....
I'm amazed you were able to listen to that degenerate music and not become a rapist murderer, because that is the kind of shit Tipper Gore was going...