In reality, the trout program is a joke at all areas except below the tailwaters. Most areas the trout replaced native smallmouth bass habitat. At least in the tailwaters that were made too cold for the smallmouth to flourish by man, there is a reason for them. It is a put and take fishery from its beginnings. They are not native to MO. They may have been around many moons ago when the state was cooler by Ice Age. It causes more issues, has the most screwed up regulations, and causes more people to act like idiots in a crowded sporting situation. Not the best sporting situation in the sense.
But it is fun. Offers a year round fishery. And is funded by those that buy the stamp and tags. I fish the local ponds when they stock them, usually a way to grab a few hours fishing in when nothing else is going on. And other states around us do it too, but not as efficiently as MO does. I have fished winter trout in IL, KY, and TN. It is always better here or in the streams that Arkansas continues to stock all winter.