Except sheet material is sold in rectangles, so you end up with a huge pile of offcuts.
As a child I was entranced by geodesic domes in the late 1970s (part of the hangover of the utopian back-to-the-land movement), and I read up on them extensively over the following decades.
I've also done a bit of construction.
Domes are wildly impractical for almost every purpose.
Yes, the hold more volume per surface area. That's great for a liquified natural gas tank. It's not so good for humans who live on flat surfaces.
They are very hard to plumb and wire.
They generate tons of waste.
They are hard to maintain.
Roofs and walls have different purposes (structural support vs shedding preciptation) and different materials are best for each.
The list goes on.
I could write a 500 page book on why domes are almost always the wrong answer, but the shortest proof I have is: if they were so great, they would have caught on.