Not only that but for anything more than 2 inches, the shaft and/or sole are noticeably large. They stick out, even if your pants are long.
I've bought elevator dress shoes and have never worn them because the sole is almost like a heel. And to get the advertised boot in height, you'd have to complement them with separate 1 to 2 inch lifts, which will destroy your feet if you are standing or walking more than 2 hours at a time.