Referer request header required for "etymology" queries?

[MasterInQuestion]

    Queries on: https://hanziyuan.net/etymology
    ; demanded the pointless existence of Referer request header trivially forgeable.
    (else complains 404)

    See also:
    https://github.com/MasterInQuestion/talk/discussions/6#Chinese-Etymology
    https://github.com/Dixin/Etymology/issues?q=sort:updated-desc+404