Why Stella became a firefighter

Is it just me or does anyone else wish they would dive deeper into why Stella became a firefighter. I know they mentioned it in season 6, but I wish we could learn a little more because after Stella mentioned it, it was never spoken of again. I don’t know if Chicago Fire does flashback scenes, hell in today’s world they probably don’t have the budget to do that, but I wish they could have an episode where a call similar to what made her want to become a firefighter happens and it makes her "relive" that day in a sense and we get to see a flashback to what happened that day or something like that. That could be a decent episode maybe since the writers seem to be running out of ideas