If this is true, it really don't show.
Then again pic related was made by a multi-billion dollar company over the course of 5+ years and 300+ people and yet it looks like a quickly assembled Steam Greenlight pre-alpha trash made by 5 bored indie devs
Nu Male Sky looks better and is technologically more impressive than BotW and that was made by a bunch of hipsters in less than 2 years.
It really speaks volumes about Nintendo's downfall into the shit tier league and their sheer incompetence to keep up with the times. It's like they are still stuck in 1996.
TL;DR I believe you.