Put yourself in Carlos' shoes here. The pitcher had just walked two previous hittets to load the bases. If I'm up in that spot, I'm thinking that the pitcher cannot afford to walk me. I'm also thinking the pitcher will try and get ahead of me. The pitcher's back is against the wall. So, if I get a good first pitch fastball in my zone, I'm hitting it. Period.
Stupid? Selfish?
Ok, if you say so. But, I'm up there looking for a pitch to drive and tie the game.