I’m not sure I can explain properly. Still I’ll try. Let me ask a few questions.
Is Irish c pawn structure good or Bad?
Is it correct to surrender Double B pretty early in the game, like you do in Nimzo or French?
Is it correct to move the Bishop three times in less than ten move like we do in Ruy Lopez or Armenian Variation of French?
Well, you can’t answer any one of the question purely based on the accepted opening principles. Chess is much more complex than that. We can’t even decide whether BDG is good or bad.
I’m not competent to base my arguments based on Silman’s methodology. So let me try it with Pawn Structure Chess. Let’s say black has queen side majority and White has central majority like we get in QGD. Lets assume visualize the standard pawn structure. Black has pawns on a,b,c,e,f,g and h files and white has pawns on a,b,d,e,f,g and h. Let’s say Kings are on g1 and g8. If there are no pieces on the board, black’s Queen side majority will be very difficult to handle. Hence black should strive for simplification, retain the queen side majority and get a break thro’ in the queen side with c5. White should strive to retain as many pieces on the board and start rolling it’s central pawns. That’s why white strives for e4 in QGD. Suppose, as black I try for exchanges and go behind white pieces. I might lose the game since my pieces might become uncoordinated. Now let me assume white doesn’t have d pawn and black doesn’t have e pawn. (six pawns each) My impulse would be to shift my king to h1 and start a pawn march with e and f pawn instead of d and e pawn since I still have central majority.
Now this helps at lower levels. After all, I have a plan and my opponent may not have any! This is absolutely insufficient for growth. Chess doesn’t have strict rules. There are only guidelines and general principles. These approaches tend to make them as rules instead of guidelines. That’s my primary objection. It’s a cult. You get attracted by a principle and it definitely helps you in the short run. No questions about that. Over a period we tend to believe it is the only truth around. This can only be bad in the long run. You can take it from a reformed addict of pawn structure cult.
Silman’s is a honorable cult. But a cult all the same.
My second objection to these approaches is philosophical. Chess exists for the sake of chess. It doesn’t exist for pawn structure or imbalances.