Are Sleep Functions Irrelevant For iMacs?

I was going to setup a hot corner to put the display to sleep. On reflection, I can’t see it makes any sense for an iMac. After all, there’s no battery saving to be had when an iMac is always plugged in and secondly, putting the screen to sleep won’t put the iMac’s processor to sleep so why bother putting the display to sleep anyway. Seems to me that the ‘sleep’ options are only there for MacBooks.
Is my logic right on this please, Gary?
Thanks
The ‘why’ is simply to avoid any likelihood of screen burn when I’m away from my iMac and to minimise any wear on the components in the computer.
—–
Charles Bake