This is the ITILv3 definition of Service Request:

---

The term ‘Service Request’ is used as a generic description for many varying types of demands that are placed upon the IT Department by the users. Many of these are actually small changes – low risk, frequently occurring, low cost, etc. (e.g. a request to change a password, a request to install an additional software application onto a particular workstation, a request to relocate some items of desktop equipment) or maybe just a question requesting information – but their scale and frequent, low-risk nature means that they are better handled by a separate process, rather than being allowed to congest and obstruct the normal Incident and Change Management processes.

---

Agreed this is technically unnecessary but this is a business decision per se, so if you can't convince them otherwise, it will have to go the change way.  To ease on the burocratic redundancy, maybe let the flow that manages the catalog item also automatically create and follow through (close) the Std CR.  At least like that, you will only feel the pain once (when building the flow)...

Good Luck