Not unlike many fields of profession or areas of interest lure/bait making has a learning curve if it is done on your own to learn to do it consistently and effectively. This also includes some field testing to evaluate your material(s). It is enjoyable but it can be time consuming unless you just make something and just use it during trapping season. Then you find out right away if it works well for you or not. Or back to the drawing board.
Just making a simple bait or lure for your own use can be challenging, enjoyable and rewarding when you get good results. Or frustrating when it isn't quite what you expected. I think most will find over time that good trapping skill helps to improve the productivity of your lure or bait making skills. I wonder what that relationship could be?

Many various things can be thrown together for what I refer to as a reasonably productive stink. if it works well for you that is great. Many old timers did just that with basic available meats, herbs, spices and glands that they collected,
With the several bait solutions available commercially today they sure have made the bait making challenges much easier.
I always encourage trappers to get more involved with lure and bait making. I think in todays society we are seeing much more of this and I am encouraged and quite happy to see this happening.
It was a great experience for me that came from dabbling with lure and bait making years ago that got me interested and finally developed into a rewarding profession over my lifetime. It took a large part of my adult life to learn my trade on my own but it was a decision I have never regretted.
I agree lure and bait making isn't rocket science for some simple and basic concoctions. However, there is lots of experimenting and learning what you can do and what you shouldn't do again. Lots of trial / error. There is considerable chemistry involved in commercial work and some is involved in basic consumer lure and bait making as you will find. That is just speaking from my background .. If you haven't learned this yet you are just getting started. LOL
When you need to build 50 + products every year you better know your game and how to do it as consistently as possible each time. That can be a challenge for even a seasoned professional at times to be on your game each and every batch. Organic and biodegradable products are much different and inconsistent to work with at times and they can vary a little to a lot every batch that you make every year.
It presents its challenges no doubt.
How to prepare, collect or acquire all of your ingredients for inventory to build all the products when they are needed is a considerable job in itself. The formulation blending process is the easier and most enjoyable part of the job. That even needs monitoring as it is being done.
I agree some simple things can be thrown together with little thought at times and become satisfactory in their function after some time in working your method out over time. Or you could have put some stuff in a jar or bucket to forget about it and when you did dig it up or open the container it wasn't what you expected. LOL
I doubt anyone who has an opinion has been real successful in their attempts at lure and bait making until they have had considerable trail and error involved along the way to reach an acceptable product for their own use.