I'm in the midst of renovating a house at the moment, it's about ten years old.

The plumber siliconed all the shower valves to the fiberglass walls without screwing them to a backplate.

Unsurprisingly the builder is now out of business.

https://structuretech.com/?s=new+construction and the "That Ain't Right" guy https://www.tiktok.com/@gold.star.inspections are enough to tell you that if you're buying new, you want to get there before it's built, from a builder that's been in business for at least a generation, and have your own inspector riding their ass the whole way.