Earlier quoted context omitted.
As for obsession with in-house movements, I like to observe to the obsessed that the most in-house brand of them all are... ...Seiko. They even make their own lubricants. (Wearing a nifty Seiko as I type this, but also own a handful of other Japanese, Swiss and German watches.)
Seikos are extremely underrated. Also most people don't know, but they even make watches as intricate as the most expensive Swiss brands. Like this one which retails for a cool $365,000 USD: https://www.grand-seiko.com/us-en/collections/slgt005g Or you can get a nice everyday mechanical watch for as little as a couple hundred.
The majority of expensive watches, even handmade, are only so expensive because of brand...or the fact that the case is solid fucking platinum/gold. That's cheating!