Always? That's tough to swallow.
I also have difficulty with your words "at ALL, period." Especially since you go right ahead and offer two ideas why it might have benefit. However I agree with you about the typical combat utility of throwing a knife.
But, to reach your proported level of skill you must have made many, many thousands of throws.
Not so much that I made thousands of throws as I changed the way I throw them. I got the technique from a 50's USMC hand to hand manual titled "Cold Steel" by one John Styers( Much recommended for far more than just the knife parts BTW) , who in turn got it from a technique he attributes as being used by the Gold Rush miners of the mid 19th century.
If you can walk, and bend your elbow , you can do this.
If you can stay within 12-15 feet of the target you can become a grand master.( go ahead and start your own style, everyone else does).
if you need to throw further out than that your chances decrease no matter what knife you have but they decrease less with this method, because you do not need to know the number of "turns" the knife makes before it hits, because the knife does not turn as it leaves the hand.
Here.
Try it out:
*Start by standing normally.
*you take your knife and rest it in your palm, handle locked in place by the thumb, blade/handle in line with the forearm and protruding past the fingertips.
* face target.
*decide where on the target you want to aim.
Keeping blade, fingers, wrist and forearm perfectly straight, bend elbow and draw arm back, palm supinated, as if preparing to bowl a strike.
* take as many steps as you want/need to build momentum.
*twisting your waist and following through, "aim" your fingers, where you want the knife to go,and, palm up, "shovel" the knife at the target , releasing the thumb at the desired aim point , allow arm to follow through.
Let me know hhow you do with it, I expect it's easier to get consistent results with that than the end-over-end method.
(Still wouldn't use it if I had a better means available *shrug*)