The debated topic is kin dried verses seasoned, and wood that has been kiln dried is not necessarily seasoned.
Does this make a noticable difference when building bows, I don't know.
But having a kiln, and drying wood, I do know this, if you don't do it properly, and follow the" recipe" you can wreck wood in a hurry. Dry spruce too fast, and you will case the outside, and seal moisture in, finish pine at too low of a temperature, and you won't set the pitch, and you will gum up everything. Every single species has a different procedure. Are all the production mills following all the labour intensive recipes- i dunno !!!
But that's the debate, for what it's worth.
Good now you will also have one more thing to think about, and not just me