Yeah, at least for the dwarves that I imagine they’re not just about efficiency and quality but they really want things to look interesting and intricate. (Not that brutalism can’t be interesting but it is not finely detailed/intricate like dwarf work.)
Google says average 0.16 mph (0.26 k/h) with a top speed of 0.5 mph. Humans average 3 mph strolling speed.