Scotch game: Why is taking the knight a bad idea?

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JackOfAllHobbies

JackOfAllHobbies
Diakonia

In your first example, you have traded off your only developed piece, and developed whites queen.

In your second example: 

One possible idea would be to play c4, Nc3 placing a firm hold on the center, especially d5.  

Sqod

More examples of unwisely attempting to use the c-pawn to drive off the centralized queen: 

(I omitted references and the continuations of the games.)






ChessOfPlayer

In the first game, gave gave yourself a bad position after you took the knight.  Taking the knight is the scotch is perfectly alright.  But I prefer bc5.  Don't take much heat into what the computer says.  I would rather take the knight than play Nf6.