[gif set] "You can see the exact moment when Sherlock actually regrets saying that." Because John was in the freaking war. He went through that every day and Sherlock didn't think about it . Excuse me while I go tear bend
And when Molly tried to imply he only cared about John's opinions/concerns he quickly let her know she always counted too. So all we've really learned from this is, when pressed, he will be considerate of peoples emotions.
But John could. When John married Mary, he very effectively killed a part of Sherlock. Funny thing about this show, it really knows how to kill you on the inside.<< You can't kill Sherlock physically, but you can kill him mentally.