On an unclad, sanely sized house that's still like two days for the apprentice to install and pull cable, tops. $200 for the poor sod doing the work, $80p for his boss, and $2k for the company is still nowhere near 2 electrician months of labour.
Every state requires pipe in many places, industrial, most commercial, large multi-unit buldings. The only place in the USA that I know requires pipe in resi is Chicago.