This makes sense, the value I see using the kiosk is you don't have to go through the hassle of doing manual fingerprints and passport photos, and you don't have to worry (generally speaking) about screwing anything up on the Form 4.
For example, I did a manual filing and a silencer shop filing within the last 7 days. The manually filing cost me an additional $80 to get fingerprinted and pictures taken (fuck you very much, Northern VA cost of living) at the UPS store. With the SS filing, all that is forgone.