Is there ever a reason to query ioctl for hardware info when we have sysfs?

My assumption is that sysfs is built using ioctl queries, meaning all the information you would want (or at least most of it) is already available by simply reading files on sysfs. I notice some programs (e.g., hdparm) still use ioctl calls rather than simply hitting sysfs , and I'm curious if there's a reason for that. Is sysfs unreliable? If you're only interested in hardware info, is there a reason to use ioctl over sysfs?