Why public role to access the object sys/system to all users

Hello
I'm trying to find out
What is logical to give access to these system sys objects / to
everyone through public role. Why does everyone need to access these objects system/sys.

Should we revoke this public access or leave them alone.
What is the use of these tables.

SYS AUDIT_ACTIONS
SYS AW$ AWCREATE
AW-SYS $AWCREATE10G
SYS AW$ AWMD
SYS AW$ AWREPORT
SYS AW$ AWXML
AW-SYS $ EXPRESS
DOUBLE SYS
SYS IMPDP_STATS
KU SYS $ NOEXP_TAB
KU SYS $ _LIST_FILTER_TEMP
SYS ODCI_SECOBJ$
SYS ODCI_WARNINGS$
SYS OLAPTABLEVELS
SYS OLAPTABLEVELTUPLES
SYS OLAP_OLEDB_FUNCTIONS_PVT
SYS OLAP_OLEDB_KEYWORDS
SYS OLAP_OLEDB_MDPROPS
SYS OLAP_OLEDB_MDPROPVALS
PLAN_TABLE SYS $
SYS PSTUBTBL
SYS STMT_AUDIT_OPTION_MAP
SYS SYSTEM_PRIVILEGE_MAP
SYS TABLE_PRIVILEGE_MAP
WRI SYS $ _ADV_ASA_RECO_DATA
DEF SYSTEM $ _TEMP$ LOB
HELP SYSTEM
MVIEW SYSTEM $ _ADV_INDEX
MVIEW SYSTEM $ _ADV_OWB
MVIEW SYSTEM $ _ADV_PARTITION
SYSTEM OL$
SYSTEM OL$ HINTS
SYSTEM OL$ NŒUDS

PL see also these Docs MOS

Be careful when the revocation of the privileges granted to PUBLIC Document Id [Document 247093.1]
Default privileges assigned to Id of Document PUBLIC [Document 759684.1]
Invalid objects after revocation RUN Id of Document PUBLIC privilege [Document 797706.1]
AUDIENCE: Is a user, a role, a group of users, a privilege?          Document ID [Document 234551.1]

HTH
Srini

Tags: Database

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