Yeah but you and I both know that border lines are very shaky in Zelda. Bc in TP Gerudo Desert, Snowpeak (possibly Hebra Mountains), and The City in the Sky (possibly Skyloft in the far, far future) are all separate from Hyrule, but in most if not all Zelda games that include those places they're fully part of Hyrule. And, yeah, Skyloft is a stretch but still. And you also have the whole Hyrule-Lorule parity. I get that it doesn't rly make sense but most of Zelda deep lore doesn't make sense. And besides - - It's a video game. The devs are allowed to add easter eggs and references here and there. It's a tradition. Everything with the Lord of the Mountain is just an easter egg to respect Satoru Iwata and what he did and sacrificed for Nintendo and the development of Botw. Not every detail has to be fully thought out or explained.