I totally agree with the article, yet I don't disagree with the light bow advocates, either when they contend that a light bow can also be very effective. If you want to shoot a heavy bow and are willing to do the work, go for it. If you "work out" to "work up", it is not all that hard to shoot heavy poundage, just be cautious to avoid injury. I prefer heavier bows, but now I am shooting light, because of an unhealed injury - I grabbed the heavy bow and started shooting it before getting in decent shape.
An interesting observation I have made is that there is little difference in the velocities of my light vs heavy bows. However, the heavy bow does it with a heavier arrow. Power is a function of both mass and velocity, so if velocity is constant but arrow mass is increased, the heavier arrow will deliver more power to the target animal, assuming good tuning, sharp broad head, etc. Whenever possible, I will take the edge offered by the heavy bow. There is no such thing as overkill in the hunting field.