In the world of after market performance parts, I take everything with a grain of salt. I think all the tests are marketing props to lure the buyer in. Keep in mind, the buyer is halfway in the door as he already believes a CAI will help his truck.
Yeah, I hear your, Intakes have been a little misunderstood by enthusiast customers for a few reasons. A. Easy to do B. Looks great when talking around an open engine bay C. it's more affordable than an exhaust and wheels/tires/most big brake kits and other upgrades. So it's accessible and easy, but it's not as important if you don't have supporting mods--but it's like makeup, it's a fantasy dress up thing more than it is a power mod
Many are absolutely proven to be more effective than oem even from stock and without a tune by a lot of third party testing, but it's an expensive piece of a more expensive puzzle, so people stop there in mods. But the market is HOT man, so there's usually a lot out there and half of them are marginal at best, aka, only for looks not performance.
The best ones I've had have the whole cone filter tightly sealed in the fenderwell, or a sealed box like the oem design, then ofc I've seen the methanol and dry ice type too. Besides that, you're right, it's like makeup - most are made for engine dressup and to look at at car shows, it's more romance then performance, for sure. But, who doesn't like a little romance in their relationship. It's the experience modding, the new sound and the look - it's personalized and different from your friend's - it's a reason to even open your hood rather than leave it down at a show somewhere. To me back in the day it was a door opener mod, and was the first step to getting me working on cars myself.
So, 8-10hp for $350, brings a lot of smiles and experiences with it for early stage modders. So, can be pretty worth it. I mean, who likes to go to car show, and have NOBODY care about their totally oem engine bay? "what've you done to it?"..."nothing man". I don't have one in this frontier, but it's a good icebreaker alteast.