Then why tie the article to the boy attending the funeral?
Here's a wild guess.....
Because that's where he went.
Because the boy did leave the house, in defiance of his father’s instructions. That is why both facts are tied together.
Fact #1: The boy attended a fire fighter’s funeral to pay his respects. This would have been (unequivocally) a good thing, except that Fact #1 is tied to fact #2.
Fact #2: The boy defied his father’s instructions about not leaving the home (without asking permission to attend the funeral) in order to attend the funeral.