Clearly you have not owned many sets of aftermarket shocks! Yes of course kW in consultation with mountain pass picked a setting for rebound and compression that was a compromise across a lot of potential user scenarios. But that compromise setting for both compression and rebound might not suit everybody all the time in all scenarios.That's one issue. The other issue is that of course shock valving wears a little bit overtime. You in fact can compensate that by dialing up shock firmness. The fact that you don't know that says again you don't have a lot of experience with this
I would love to hear @MountainPass input on this. If this really were the case I don't think they would offer a non adjustable option they don't believe in. If it is ultimate comfort I am looking for then I believe in MPP's knowledge and experience to dial that in for me in their comfort coilovers... if it is flexibility that I'm after then yes the adjustable version makes sense. But to tell someone not to consider the fixed setting option is like suggesting that is an overall inferior product. Also, if you are dialing up the shock settings to compensate for a leaky or weakening shock you're not fixing the main problem, you're just delaying it. It's like putting a band-aid over an infected wound.
Finally, for you to assume that I don't have any experience with aftermarket shocks saids a lot about you. What lead you to this conclusion? Matter of fact I've experienced a wide range of aftermarket suspension since I was a kid in high school with just about every car I've owned. From springs, to eBay sleeve "coilovers" to high end adjustable coilovers to full air ride suspension, I pushed the limits of these cars in their own rights and have learned a great deal about suspensions.
Here are some of the cars I've owned and worked on in the past. Suspension and wheels/tires are usually the first things on the list.