All of that is 100% bullshit.
You'd have to be saying Jeep's senior most engineer Jim Repp (aka the 'father' of the Wrangler Rubicon) was lying to me when we had a long conversation years ago and he explained how the TJ's OE factory air intake is more than able to easily flow more air than the engine can possibly pull. I asked him specifically about that a couple times. He also confirmed that SOME air intakes are definitely restrictive but he also confirmed they/he specifically/purposely designed the TJ's air intake to be 100% free flowing and without restrictions.
Sorry but I'll DEFINITELY believe Jim Repp before anybody else. Jim recently retired, he started with Jeep back in the CJ days.
https://www.motortrend.com/reviews/154-1303-10-years-of-rubicon/
And if you really want to confirm what he said about the air flow in the OE air intake yourself, Jim is a regular on Facebook as James Repp where we still have conversations.
Believe what Jim said or not, your choice.
Jerry I'm not going to crap all over the OPs post arguing opinions with you. If you have some real data or facts post them in the other thread, and we can discuss further.