I think you're focusing on the wrong parts of a gunshot and what can make shooting unpleasant. The suppressor does completely eliminate the concussion of the shot. What's left is the supersonic crack which can be loud though. The absence of the concussion does change your shooting experience a lot.
As far as the recoil reduction I'll link the thing you're referring to below. So there's a couple different measurements going on and you seem to be caught up on the Average % Reduction and the % Reduction In Overall Momentum. Suppressors are not even in the same stratosphere as muzzle brakes when it comes to reducing the overall momentum of a shot. However, if you look at its Peak Force Reduction it isn't that far off of the brakes. If you go to the section at the top labeled How To Read The Results you'll see a bit of a description of how you should interpret them. There's no set system for what makes recoil unpleasant but I personally fall more into the Peak Force camp when it comes to what does it. The suppressor smooths out the recoil impulse and instead of a sharp kick it instead turns into more of a shove. For me at least that (and the absence of concussion) makes my shooting experience much more pleasant. Even if the total overall momentum reduction isn't as high as a brake, and I've used very aggressive muzzle brakes before I got my suppressors.
This post summarizes the results for the recoil tests ran on 20+ muzzle brakes using two 30 caliber ...
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