If you knew how many nails I have pulled out of boards, my dad used to sell houses built with all used lumber, and used bricks, he even used antique adobe that he would take from very old adobe houses, the very large adobe, unlike the modern ones, in a personal house for himself he used old insulation out of old railroad refrigeration cars, used lumber, and antique adobe.
My step grandfather had a house moving/house destruction business and also a salavage yard. The salvage yard was all the materials from the houses he demolished. Most summers by brothers and I were pulling nails from boards and chipping grout from concrete blocks and bricks so gramps could stack em and resell them easier.
Cool you had that experience with your dad. The materials definitely have the potential for reuse.
I began in my early teens figuring out electrical, plumbing, framing, etc... I remember well the unintended indoor sprinkler system where every joint was spraying water... lol. And I have still have the live wiring scars some 50 years later. Good times.