Once you wrap a house in blue skin or other treatment, it is like wood on the main floor.(which nobody has a problem with)
New ideas are hard for people to accept.
I am a certified Nudura ICF installer, which is another concept that people did not understand at first.
Also do hydronic heating, which has been done for ages in Europe, but in NA we use Force air (gas,propane, oil, electric)
Which is not as efficient and not as healthy.
There is also SIP panels that are in use.
All different methods that create a living enclosure.
As for UFFI, government did not test properly, gave a rebate to put it in, found out it caused issues, gave a rebate to take it out and made
Real Estate Lawyers include it as a disclosure in documents. Now they dont really care anymore and wont do a thing to help homeowner recourse.
Buyer beware, meanwhile there is no issue if you air tight seal your walls and put in an HRV system and its does not cost six figures.
Like Radon gas from basement.
Do people know if they insulated under basement slab, or even if they put 6mil vapor barrier? etc......
Bottom line educate yourself on products you want to use and verify testing by government agencies and if you seal walls on outside from moisture pentetration by a competent professional and do same with interior adding HRV to Forced Air or Hydronic system there will be no problems. You can use tires, straw, mud etc... look online its endless the creativity out there.
Find something that works for you.