[zdragnar]

Sure, every home could have its own craft beer brewing kit.

The thing is, unless you're enjoying it as a hobby, it's better to just buy it pre-made. You don't need to buy materials to have on hand, or guide the process of making it. And, you don't have to wait for it to be finished.

Same goes for any number of other hobbies- silk screen printing t shirts, candle and soap making, etc.

Would I want enough printable materials on hand to print a couch at any given time, or would I want to order them, then manually print a couch? Or just order one from a local print shop and have it delivered already made?

99% of people don't want to lose valuable storage space in their home to raw materials if they don't have to.