I don't know about this, I get the point, and would agree at face value, but it's going to depend on so many factors. I think most importantly, live sparring and actual competition is everything, that's where you build the calm and collective mindset to excel in combat sports, because anyone that has competed, especially if they were thrown into amatuer fast, knows that shyt goes out the window once you first fight someone. I still remember my first wrestling match, as a kid, where I lost because I got the guy on his back but forgot to secure the underhook for a pin because I was nervous, that was after months of training.
But regarding the time frame, not sure how other camps go about it, but it was the same in wrestling and thai/boxing for me, but that 2-3 months might be entirely dedicated to getting you in shape first, and it's what I agree with as a serious approach. So in that case, I would honestly recommend people just go into BJJ, or some similarly complex grapple art, I would advise wrestling but good luck finding a wrestling club willing to take on fresh faces that aren't looking to compete. Should be easy to find a serious BJJ spot and the have a ton of events going on that you can get serious experience in.
. Black men really need to start getting to the gym and most importantly take up boxing or another fighting form. Someone said I was lying but I've been to both boxing gyms in NYC and Florida, in both places the majority of people in the gyms were either white or hispanic. Even when I was at a gym in the hood 
Based on what?