yeah, i can tell you are quite young
but i agree, why not take those rocks and form them into nice blocks we can stack
like i said, here on this island there is so much big chunky blocks of various grades of basalt, people mostly use them un-carved but if you can put together tools to chip them into bricks then they stack very nice
probably the hardest problem is what tools to use... i think steel can do this but you gonna wear them out pretty fast... tungsten tipped spinning disks are the more practical way but that's also a lot of layers of tooling and production to get to that