Hemi valve covers with oilers

What are the advantages in having the internal oilers vs the valve covers without the oilers in a drag car.
I realize the oil aids the oiling of the springs and rockers, but in a drag car is it important to do that?

Does it aid in helping the valve springs last longer?
Does it help with the rockers being oiled at startup?

Or in our application it just doesn't matter because a hemi puts a bunch of oil up top anyways?