That has been repeated in the comments many times now, but the very headline says that this tutorial was indeed also intended for non developers.
Like some open source Github project that the author merely wanted to install, not starting to mess with the code. Basically, it is complaining in a satirical way about installation readmes, that maybe they could be made easier, that also non developers can follow some simple steps. A complaint that I can very much agree with, even though I am a developer. But so often little steps are left out and when that happens in a area you are not familiar with, then this can mean lots of wasted hours.