RE: Does it really make a difference?
Any arrow, proplerly matched to the bow, can be shot accurately. With some, you may get lighter or heavier than you want, but you can usually make adjustments to get around that.
Personally, I like wood arrows. The only reason I started shooting them was to be "legal" for the longbow class at some tournaments, but the more I shot them and the more I learned about them, the better I liked them. I don't shoot them because they are "more traditional"--they do have their own benefits.
Getting them matched perfectly can be work, but a good shaft supplier will do most of that work for you.
Saying wood is for the fire, well.....I reckon everyone is entitled to thier opinions. My bow is mostly wood as well as my arrows. Wood has taken gobs of game and won gobs of tournaments. I'll just leave it at that.
Pick your arrows based on what you like and what works best for you.
Chad