Two observations:
1. That is not a "wallet holster," as the reviewer described the leather for his Seecamp. It is a full-counter-print panel holster of the type first designed by the late and legendary R. J. Hedley, and thereafter copied by many other holster makers. (R. J. called the design a "Back Pocket Holster," but it works well in any pocket. A rose by any other name . . . , etc.)
2. The reviewer's problem with alleged "visibility" of the R9 through the pocket opening when carried in a front-side pants pocket can easily be remedied by having a skilled seamstress or tailor add an inch or two of depth to the pocket. I have that done for any pants I purchase with shallow side pockets. With the BDU trousers (Propper or True Spec) I usually wear, now that I am retired from the legal "rat race," there is no problem whatsoever.
[Edit: Corrected syntax.]