It is my understanding the whole three timelines splitting at Ocarina of Time was made up by Nintendo for Hyrule Historia. Fans wanted the series overall to make sense as one mythos, Nintendo is physically incapable of caring about this story. This came to a head with BotW being specifically designed to not fit in any of the three timelines; it’s in the far future, there are Rito and Zora around, etc. and then TotK directly contradicts Ocarina of Time.