I could choose not to quibble with your designation but where’s the fun in that? ;)
I wouldn’t call it a Parenthood film… Kayla’s dad is a secondary supporting character and it’s true that it all builds up to a powerful daughter/father bonding moment around the fire. But I think first and foremost, it’s a Childhood (or Adolescent) film. Honest middle-school films are few and far between. I think that’s why it strikes home even for non-parents.