You can shoot light arrows, medium weight arrows, or heavy weight arrows. If you are shooting Whitetails with modern equipment I doubt it makes a meaningful difference.
I will say if you shoot fixed blade Broadheads you should maintain at least 12% to 15% FOC. I prefer to stay on the higher side of FOC.
I have several setsof arrows ranging from 329 grains to 505 grains, and one thing they all have in common is adequate FOC.
Too many people shoot too light a broadhead trying to gain 4 to 5 fps. What a waste.

Dan