Eh... the great Squadfather thinks I am not yet ready for Squad membership. However, he has agreed to make me an apprenctice..
No offence mate, but you shouldn't ask for anyone's approval or justification. Seeking the approval of someone implies a lack of confidence / judgement capacity on your end. Of course, I might be reading into this too much, not to mention be completely wrong, but others share my same view. Prove yourself enough and you don't have to ask to join us - we'll approach you, which is how it's been with all our members.