Example: Say I wanted to build my own laser cutter - and I wanted the mechanism to be flexible enough to have a 3D print head option. What books would I get?
"Laser cutting with 3D print head option for Dummies"
Yous twos are discussing two different points.
True , you'll find more "ready made" type projects in magazines. And after connecting everything together and the blue smoke comes out somone that hasn't "read a book" will come here asking how to troubleshoot the controller that "quit working after a spark".
It's the same elephant. Eventually you need to feel all around to get an idea of what it's like.
If you keep grabbing the tail, it's thin with a bushy end. Quite small and harmless. What could go wrong ?