> Cathedrals? Bah, nonsense.
The comment I responded to said this: "sculpted statues and gargoyles and domes and columns and flying buttresses and trusses and everything inside and out was covered in intricate carvings and gilding and mosaic and fresco and ornament."
That's a cathedral. You won't find that in a "humble regular building". It does not fit the image you linked.
> But many then were deliberately built to be nicer than was required.
Sure. Same as many are deliberately built nicer today. In the city centre where I live they built a new hotel, and they have amazing Ionic order columns on the facade. And they look freshly carved and beautiful.
There is just little point in comparing prestige architecture (the one with the gargoyles, and domes and flying buttresses and carvings and mosaic and fresco and ornament) with regular buildings. Instead we should do exactly what you did in your comment. Compare a regular building from then, with a regular building now.