I think this guy was just musing about Apple's quality and has watched a lot of AvE and This Old Tony on YouTube and wanted to share his opinions with the world. They're not all entirely correct.
For anyone who wants to go on the whole manufacturing journey, don't miss the Linus Tech Tips video about why their screwdriver took 3 years to bring to market (https://www.youtube.com/watch?v=2K5Gqp1cEcM). And they based their design on a fully functional production-ready screwdriver, they did not start from scratch.
Going from idea to production is really, really hard. Even today, even with CNC and 3D printing and other prototyping tools. Even with all the money LTT has to spend on it (millions of dollars, as I understand it).