I'll take this for my one-time mentor, not trying to usurp your authority, Chief, trying to be the NCO you helped train me to be.
Knowledge, and the pursuit thereof, is going to stand you in better stead throughout your life than assuming you are the expert. Without registering on AR.com, you will not be able to ask germane, relevant and cogent questions on those matters that need edification. You want to be a Ranger, therefore, join Army Ranger dot com, as that is the Ranger site. The Chief is a Ranger, and SF, and a medic, and knows things... why even ask that question? You were sent in a direction by an expert, and questioned it - try that if you make it to Regiment and see how long you last.
There are lots of Rangers on this site, and no slur is cast upon them, nor their abilities to answer your questions, they are wholly capable of imparting the knowedge you seek. But the Chief gave you a direction, because it will broaden your ability to get more information from which to make a decision...
Depth and Breadth of knowledge are good. Be a good Padawan and learn.
