That's how got your laptop to run without Optimus, since you effectively disabled it. However, it's only possible to so on old (< 2012) laptops or (very few) high-end models. Those settings require a hardware multiplexer and modern laptops are thoroughly cost optimized.That's done by switching to Discreet in the BIOS.
It's how I get my boxen with Nvidia and Optimus running. And as previously state I do a lot of things differently never having read the Handbook once and teaching myself to use FreeBSD. Such as never having used fstab.