Don't overcomplicate it. There is no one true way, for Minecraft or for anything.

    I don't get it

Because it looks cool to see the real world in blocks. And if it looks cool, it is cool, as they say.

You're actually allowed to play video games the way you want to.

"this is a game where each block must be placed with purpose"

You lack the hacker mindset if you think you "must" do anything the way it was designed.

Think you are missing a couple decades of Minecraft automation. Its been done since the beginning. This is just cool example of taking it to extreme.