I would agree with most of your comment...but not this. Now if you are talking about the tradtech mass produced wood risers then sure. There are some high quality wood risers out there.
The one thing you realize with shooting a stick bow....mass in the riser helps stabilize the shot. That is why the old target bows of the 50's and 60's had such big risers.
I agree, those metal risers make shooting a stick bow really nice. I do prefer hunting with something thats a bit more Traditional...thus the wood riser.
IME, There is a significant increase in the degree of difficulty when you go to the thin profile wood riser longbows. I have bad elbows...and the thump for those [big Jims Buffalo] is probably what put me on a downhill spiral elbow wise. I have seen a few guys at tourneys that can shoot those incredibly well. A couple guys at the Trad nationals a few years back shot the longer Fox or Liberty style longbows pretty good.