Degreeing Cam Needed???

I am just curious what some of you think.
When installing a cam on a small block with hydraulic lifters and stock rockers,
non-adjustable, and running a single key timing set straight up, is it really neccesary to centerline the cam???? I have always done it and it always comes out correct, but, is it needed? Seems if nothing is adjustable and everything is new ots going to be pretty darned close. I am curious becaus I am at that stage of my car, but the the guy with the degree wheel is going to be away for a while. He said it wasnt really needed, but more a precautinary measure. It makes sense to me that it doesnt need done, but then again I dont want to screw up. Agina this is not a 500 HP motor or anything like that....probably tootin around 380HP.

any thoughts much appreciated!!!

-RPM