Wow, you are slow on the uptake. Check out velocity of a .22, and the velocity of a stick..
There's more to effectiveness than mere velocity.
People get killed every year by coconuts falling on their heads...and those coconuts are not falling at great velocity.
I'll tell you about the .22LR: Anywhere from 1080 FPS, to 1750 FPS.
You might get that kind of velocity from a rifle or from a pistol with a 6" barrel, but from Taurus 941 snub-nose revolver with a 2" barrel you will never see that velocity.
And again, there's more to effectiveness than mere velocity.
I have shot a rabbit in the side and observed where the projectile had exited the other side,
You can kill a bunny with a stick too....just saying...
So all I will say is that the human skull, made of bone, or a sternum made of cartilage, just may stop it, or most likely just slow it down. But once it's in you and your soft mushy organs feel it's wrath...
The sternum is also made of bone....but that's beside the point.
I work with a lady who has the unfortunate nickname of "bullet-head"....she was once accidentally shot in the head with a .22 from a rifle.
It didn't even fracture the skull.
She said it felt like a bee sting.
So tell me about your stick, or that small pocket knife you have?
Have you ever seen a person who had been beaten with a baseball bat or a pool stick?
I have.
And yes, they can be very lethal.
As for knives....
Place a small knife in your hand and walk towards a police officer and see what happens....
The cop will draw his pistol, I guarantee it!
Why?
Because cops understand how deadly a knife can be.
If the .22 was effective at stopping humans, then cops would be carrying them.