In the main line of the Scotch Four Knights
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1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Nf6 5.Nc3 Bb4 6.Nxc6 bxc6 7.Bd3
What's wrong with 7...Bxc3 ?
It seems this move is played very rarely, but, when I play White, I would not like to face it, because of the horrible pawn structure White gets, with isolated doubled pawns and another isolated pawn. For example, see the position after the normal moves 7...Bxc3 8.bxc3 d5 9.exd5 cxd5.
Of course I see that White gets the Bishops pair and an open b-file, and he can also play Ba3 preventing Black from castling. But is this enough to compensate for the bad pawns? Or is there something else that I don't see? What should be the plan for White after 7...Bxc3 ?