Just keep in mind too that we can calculate energy all day, and very easily, but how that energy goes to work, and how much or how little, depends entirely on bullet design and construction as well as impact velocity and shot placement (specifically amount of resistance encountered and vital area).
Without being able to efficiently go to work by transferring to hydraulic force, energy of the bullet remains only a potential. There are many bullets that impact with a ton of kinetic energy, but don't do much or anything thereafter to allow that energy to transfer to hydraulic force, and thus wounding (blood loss and asphyxiation), as well as shutting down the CNS, or at least create s spike in blood pressure.
As far as BC…
So while I completely agree BC is important and that BC and muzzle velocity tell you everything you need to know about first order trajectory including wind drift, it's not everything when terminal ballistics are the main concern overall. Obviously terminal ballistics and the bullet's performance and behavior is what matters most to the hunter. There are trade-offs to consider and deal with.
One of the common trade-offs is with bonded or multi-part hunting bullets like Nosler Partitions, Swift A-frame, etc. While those are designed and constructed for specific terminal effect, oftentimes those bullets are less precise due to the imbalance incurred by the more complicated structure. This is why bullets designed and constructed more for the long range hunter are more simple and consistent in design, to include lathe turned monos.
Where BC comes in is two ways: One, it makes it easier to hit your target with the uncertainties of wind. Secondly, higher BC will allow the bullet to retain velocity better which means higher impact velocity and greater terminal effect overall, with all else equal.
So long story short, energy and BC go hand in hand. Bullet construction and design, and thus terminal performance and behavior, matter most for a hunting bullet. How much energy is there (and retained by high BC) doesn't matter if it doesn't properly and efficiently go to work for us.
A great hunting bullet will indeed have a high BC to give us more capability and make it easier to place our shots right where we're wanting by retaining more velocity and drifting less, especially if used long range. That bullet will also be constructed and designed to produce a great deal of hydraulic force, and thus wounding. It should be highly effective and efficient at doing so. That will mean as long as you keep that bullet within its velocity window for proper performance, what energy potential it has will be sufficient at getting the job done. That's why I focus on impact velocity rather than energy as far as determining where to limit my shots with a particular bullet.