The main point of the CAs is for you to get over your anxiety of approaching/talking/flirting/closing/whatever HBs. It's meant for experience sake so you can destroy your fears of rejection, see what works for you and what doesn't with HBs, determine how HBs percieve you as a stranger, and eliminate the limitations most AFCs place on themselves (i.e., the only way I can meet an HB is through friend of a friend or out of pure luck if she works/studies with me). If you think it makes you seem desperate and needy then that's exactly the impression you're gonna make every time until you learn how to change that negative mindset you place yourself in.
I mean sarging isn't the only way to meet HBs but consider this: it's definitely the fastest method in all areas. Nothing else is going to build your experience with HBs as quickly, nothing else is going to give you access to so many opportunities in such short time, nothing else is going to purge your social phobias/anxiety/fears of rejection as effectively, and nothing else is going to increase your chances of getting digits/date/puss/ONS/LTR like sarging will.