dark square bishop in the London


Hey there, wondering what main ideas are for the dark square bishop in the London after 1.d4 d5 2.bf4 ..., I struggle to see benefit of bishop on h2 - b8 diagonal. lemme know

Second, the bishop deters black from developing his DSB to d6. Black has to choose between Be7 (not the ideal square) and Bd6 (giving up a good bishop for white’s bad one). By controlling the h2-b8 diagonal, particularly the b8 square, white makes it difficult for black to employ the minority attack (...cxd4 followed by ...b7-b5-b4).
And third, if you’re determined to employ an ultra-solid pawn formation, you can afford to spend a tempo or two just to give your bishop a future.