World Amateur Golf Rankings: Something is amiss

I am not looking at specifics here, so bear with me and criticize me if necessary, but I need an answer to this question: How do the World Amateur Golf Rankings work?

Here are a few elevations since the last ranking, followed by major performance element that induced the ascent:

*Jordan Spieth, 7th to 3rd, won USGA Junior Amateur;
*Harris English, 6th to 4th, won Nationwide Tour event;
*Tom Lewis, 13th to 9th, lead British Open after round 1 and finished low am.

In what legitimate world does a victory in a junior competition count for more than a victory in a second-tier professional event? When the first tier is the PGA/European tour level, that second tier event is won in the fires of pure competition. Does the match play element of the National Junior elevate it above the medal-play Nationwide event?

Player A (Spieth) finished top-60 at the Northeast Amateur and top-20 at Sunnehanna. Evidently, his runner-up finish at Jones Cup and his top-4 at Azalea earlier this Spring got him to #7, but is a junior championship worth that much? If so, something’s wrong with an adult amateur ranking system, in my eyes.

By the way, if you want to see the World Amateur Golf Rankings, go here and scroll down to the column section on WAGR.