Just throwing this out there…I personally do *not* think the option to go Anakin Skywalker on kids should be removed from the game at all. By all means, more options are always better imho. I also have no judgment on how anyone plays their games.
Just for me, personally, I try not to kill kids.
Perhaps it is the way they are presented in the game, and the fact that I am new to Forgotten Realms…but the goblins have their own language, religion, culture, magic, and individual personalities. You can even work with them if you choose to. As presented in this game, I find it hard to buy into “goblins are pure evil and a scourge and should always be destroyed”. They just seem like a warrior society with questionable morals (canabilism? Yech) to me (as a newb). Perhaps that is why it feels icky to kill goblin children.
But overall, I would rather these types of morally dark things be in the game than have it turn into My Little Pony. It is an adult game after all.