Is Samsung. They are talking *loud* about something they purport to be a super better thing. It would help their narrative if they make it sound like all the competitors are ready to fail at any moment.
So the competitors going along with it and making it look like Samsung is *leading* in battery safety would just play into Samsung's hands.
In terms of the actual relative merit, who knows, but from a perspective of marketable storytelling, it is very much not in the interest of Samsung's competitors to play up Samsung's process. If there is merit that their competitors are told about and recognize, expect them to silently improve their process, but in no way publicize that fact.
As someone who has been exposed to business litigation and insurance cases, to me it seems more that they are stacking wood against any current and future litigation. Not only did they correct the problem, but they are going above and beyond the minimum required.
Even well-built batteries do sometimes fail, usually due to abuse, but proving abuse is difficult if the battery is reduced to a small mound of melted plastic. Any Samsung battery failure like now or in the near future are going to have a pack of lawyers drooling sufficiently to short out a warehouse of batteries. Publicising their QA process now serves to help defend against current and future litigation.