Today, I played this game in which I played the Queen’s Indian Defense. This position was reached:
I played Be7, which is a correct move. I wonder however, why Black isn’t forced to play Bb7 in order to prevent e4? If White wants to, after exchanging on f6, they can play e4.
Compare it to my recently question regarding the move d5 by White in a Pirc Defense:
When is preventing e4 no longer a priority for Black?
In the Pirc Defense I even possessed a pawn in the 5th file which means I still had certain control over the center and yet in the Indian where I had no control of the center with advanced central pawns, e4 can be allowed. Why?