Construction isn't using LLMs any time soon like that. We don't even send our files in structured data because everyone's playing nose goes for liability and sending pdfs
An economic problem would be - how could the builder of a scaffold capture _some_ value without right away be copied. The fact that LLMs threw away every protection of intellectual property at their inception makes it a lot harder to invest in (with the goal of capturing some) value. I am at least /somewhat/ influenced by RMS on the 'seductive mirage' of IP but I have my doubts on how copyleft could bring more than breadcrumbs to those who build scaffolds.
I can only assume the only realistic way to get all the federated data will be a ton of massivr vertical consolidation of industry by hubris laden tech execs crossing industry domains.