Turns out building houses is super profitable once you remove the cost of building materials, labor, and land.

Ok, but a more honest comparison here would be removing the cost of hiring architects and hiring lawyers to draft contracts, not all the per-house costs.

> removing the cost of hiring architects and hiring lawyers to draft contracts

For multi-unit houses, sure. The actual analogy is closer to removing the cost of the cement plant from every house. Fixed versus variable costs.

Fun fact: most, if not all, tech startups are actually “profitable” under this assumption.