That’s called back drag, it’s really not important in a screwdriver. I think ratcheting screwdrivers are just really gimmicky, are more of a hindrance in most cases. Maybe you can enlighten me, but really there are two main reasons here for that opinion.
It’s faster to spin the shaft with your fingers on a fixed screwdriver than it is to ratchet on the handle to turn in bolts. This is especially true for smaller bolts.
Many times to get threads to line up it’s easiest to turn the bolt counter-clockwise until the threads align and fall into place before you start turning them clockwise into the threads. You couldn’t do this with a really low back drag, or it would be cumbersome to change the ratcheting function on it. A fixed screwdriver just seems all around more efficient and faster.
So what benefit does a ratcheting screwdriver offer? It’s slower and it’s cumbersome to have to change it back and forth just to change directions. And because it has a ratcheting mechanism, it will fail faster under less forces.