Earlier quoted context omitted.
You build the biggest thing you can within a parcel because there is plenty of demand at the top of the market. Want more, smaller homes? Reduce or eliminate minimum lot sizes, setbacks, constraints on number of units, and process required towards entitlement. What is legal is what gets built. Not enough is legal, and not enough is built as a result.
So why enough housing is not getting build in Europe, surely they don't have crazy american rules but still facing severe housing shortages all over.
Surely they have crazy European rules instead? The EU isn't exactly known for a lack of rules.