I don't recall having a blood hound call in my box, or on my caller.
I don't try and fool blood hound's noses or drug dogs either.
Fooling a blood hounds nose or a drug dog is quite different than fooling a deer, coyote, elk, bear's nose, and I think that this analogy is part of the disconnect in learning.
I and many others have been doing this for a long time, nothing new..kinda like indoor toilets vs the outhouse.
Fooling a coyote's nose is really simple stuff, just imagine if a trapper never put a "lure" near or on his traps. He then would have to resort to only using snares which are illegal in a lot of states.
Lures and scent eliminators are just tools in the tool box. If you like giving the coyote an advantage, just don't use them. If you are hunting in an area that has cover, then coyotes bust you and you NEVER know it. If you walk to a stand on an old two track road, coyote comes down that same road, you are busted. Coyote circles down wind, catches your scent cone, you are busted.
I am a half way decent shot on shooting coyotes on the walk and trot, but when they catch your scent cone it is like trying to hit an F16 with a sling shot.
I enjoy watching a coyote circle down wind, and I know that when he catches the scent of those sardines and/or Rabbit urine, he is going to come in...question is how fast will he be charging and what kind of cover is he going to use between me and him. When you have two or more coyotes smell the same attractant, then they charge in ignoring the guns shots very often.
One time we killed three on a stand, drug them up to the mules we were hunting off of, and all of us took a leak. Well, a coyote ran right through the middle of all three of us, and none of us had a gun in our hand!
When you dilute your scent, you will see some incredible stuff over time. If you spray some rabbit urine on the bottom of your boot, it will help dilute the gasoline that you stood in pumping gas at the convenience store, putting some coyotes right at the end of the gun barrel that is laying in your lap.
If diluting your scent is similar to fooling a blood hound's nose in your mind, you will never learn one of the great secrets of hunting that is very, very simple and inexpensive.
Your hobby, your success or failure.
Different kinds of people in this world, which does not mean that some little thing like this makes one person better or smarter than another. It is just like the Apostle Thomas did not believe that Jesus had Risen from the Dead when he was told, he had to see the nail prints in Jesus' hands to believe it. Thomas learned the hard way.