This was just a way for home builders to save money by building fewer walls.
They convinced homebuyers and influencers that is trendy, that living in a house that feels like a Walmart supercenter was the thing to do.
I really don’t think many homebuyers asked for a toilet next to their living room.
Some interior walls might actually make it cheaper to build. All that structure is still there in the open plan, the big beams are just hidden.
Yeah true, beams get REALLY expensive
Most houses are narrow enough the modern trusses can span the whole width and there are no big beams. If you are in the exception (more likely they didn’t use trusses than you live in a mansion too wide) then a beam/wall is needed, but that isn’t the common case for modern construction.
I guess I’m stuck in the old house/renovation train of thought.