Article title doesn't contain "from scratch", so I will rewrite your example as "So, you want to build AM radio?" and my response will be "No, I want to build FM radio, because of tons of FM radio stations available to listen".
The article isn't even close to being about building a linux distribution. It's about embedded electronics engineers moving from microcontrollers with custom embedded firmware to SBCs using minimal linux for embedded systems. So accepting your revision, the response would be "no, I want to buy a stereo system".