I don't have Exos, but IronWolf Pro. I disabled head parking out of habit. I've been doing it for a decade at this point and never regretted it. I'm pretty much on the fence though.
The weird thing is that even after disabling Idle B, the heads still sometimes park. I see the load cycle count occasionally go up and I'm pretty sure I've heard it. It happens much less often than before disabling Idle B, but it's still happening, nonetheless. Obviously, I'm not counting the load cycles happening during restarts. I'd like to know why.
I'm a WD user, but I like head parking. It reduces power consumption and it's safer if the drive gets bumped. And it stops the clicking noise. Only downside is a small delay when the heads unpark.
What do you mean by "stops the clicking noise"? IME having head parking enabled increases clicking noises because there is a loud click every time the heads park/unpark (applies to Seagate and WD).