There's no way that I would shoot an overly heavy arrow for whitetails. It's simply not needed.
It is if you're like me, and have a honing beacon for shoulders. I lost a 120" 8 year before last, that I shot at a bit less than 20yds. Leaned out around a tree limb to shoot, and pulled it into his shoulder. Shooting 70#s, 380grain ish arrow and slick tricks. Ive had it happen several times on does over the years, but that was the last straw.
What do you have to lose shooting a heavy arrow? Slightly more drop (not nearly as much as people think) but your bow is quieter, and you get much better penetration.