I think the OP was just pointing out that Houston doesn’t have zoning laws (in comparison to California). Note that this has not stopped Houston from becoming a sprawling suburb with massive amounts of parking lots. Houston didn’t build good density (or even a city really) despite the lack of zoning laws. I don’t think zoning is the culprit here but it’s difficult to compare cities and compare them across different states.

Also I’m not sure there’s a meaningful distinction between zoning laws and a local regulation like parking minimums. The effect is the same so zoning laws as a concept becomes a bit of a red herring unless we take zoning to include all general rules and regulations that govern how buildings can be built, transit, etc.

Houston's parking minimums are absolutely the main culprit for the amount of sprawl it has even in its downtown areas. Every single business needs a parking lot so everything is in a strip mall and therefore unwalkable.

Sure but I don’t think it’s helpful to try and separate those from zoning regulations here. Also I think even without those mandatory minimums a city like Houston is dead set on cars at all cost. Frankly, all of America is this way too it’s just that there are a few cities where geography has constrained sprawl. I fear for my own city, Columbus. The state, county, and city governments just do not understand that car-first infrastructure is a failed policy and will bankrupt us.