Live trees have lots of water.

American modern, single family home building standards are a total joke compared to much of Europe and Japan / SK.

Almost all new homes are made of (dehydrated) wood, dry wall and fiberglass insulation, not brick, not concrete, not masonry.

Any brick, or masonry you see is very likely to just be a superficial thin veneer, concrete is basically only used in foundations, and that's becoming less substantial and more rare as well.

Its also become very common for just plastic (polyurethane, vinyl) to be used in flooring, external siding, and roofing.

The only exceptions to this, for single family homes, are basically from before the 1960s, and most of these are basically falling apart as the cost of maintenance is unaffordable to most people living in them, with the exception of some basically wealthy 'old money' neighborhoods in certain areas.