And labour is cheap.

In other parts of the world, you standardize cabinetry sizes and just build for that.

Then a long list of providers offer cabins that fit.

Custom sounds expensive and hard to replace when needed -- what's the upside?

The upside is that people can express their artistic visions by having ornate woodwork in their house. Obviously only available to those rich enough.

But for them, better than https://www.youtube.com/watch?v=t3_ug-IGBJY