Why might someone choose a stroker kit with longer connecting rods instead of longer crank journal?

Using a stroker is a way to increase horsepower when standard boring reaches its limits. For example, the 413 I am building for my '62 Dart has a bore of 4.120, and uses a 3.75" crank swing, and a 6.175 rod. It is impossible take it more than .060 over, and in reality going .040 over is about the limit. So, to be safe I am only going .030 over on it. So, instead of boring it to 060 over and risk a cylinder blowing out, I could use a 440 crank with a 4.00" stroke, and the 6.175 rod, raise the compression from about 9.2:1 stock to probably in excess of 12.5:1. and get the same power as if I bored it to 060. And, usually a stroker relates to using a longer swing crank, not necessarly a longer rod, this would be more for a stock size crank, but lengthing the rod to compensate. This is how they get the huge numbers on the really big engines, I'm talking in excess of 500 cubic inches.. For example a 572 Hemi, is basicaly a 426 bored .060 over, using a 4.5" crank and a 7" rod..