I think that speaks to the fascination people have with players who will likely be 20/20 producers, which ain't bad but just isn't as valuable as people make it out to be, IMO.
H2H vs Roto strategies also play a factor here, I think.
In my H2H leagues, I'd rather have the guy who will pile up avg, runs, homers, and RBI over a guy who will be adequate in 5 different cats.
The problem with prospect lists are they factor in defense, Butler's biggest deficit. Luckily, in fantasy, defense doesn't amount to much. The only problem is if it forces him into the DH position. I'd be interested to see prospect lists that rank only by hitting.
When you are a man, sometimes you wear stretchy pants in your room...is for fun.