Recruiting Interaction Type - why are there 4 standard interactions type that we can't use?

Summary:

As per this documentation : https://docs.oracle.com/en/cloud/saas/talent-management/22d/faimh/recruiting-setup-and-maintenance-tasks.html#s20063037

Considering the following lookup codes : ORA_LIRSC_NOTES / ORA_LIRSC_INMAIL / ORA_EMAIL / ORA_SMS

It is specified not to use this lookup codes : why not simply remove them ? Is there any hidden purpose ?

This is pretty misleading, and a waste of time when implementing.

Content (required):

Setup and maintenance -> Setup: Recruiting and Candidate experience -> Recruiting and Candidate Experience -> Configure Recruiting Interaction Categories

Version (include the version you are using, if applicable):

22C