I have climbed with quite a few partners over the years who learned through comprehensive courses by American Alpine Institute, Alpine Ascents International, etc. and clubs including The Mountaineers, Washington Alpine Club, the BOEALPS, etc.
I've had super solid partners who came up through both clubs and from guided courses. I've had lousy partners who came up through both clubs and from guided courses. The key difference was how they applied themselves and to what extent they dedicated themselves to learning on their own. You will get out of whatever course you decide to take what you put into it.