Carmel believed that if the WG got their hands on Linlin, she could easily be groomed into becoming a member of CP0, an Admiral, or
even Fleet Admiral
But why didn’t Carmel believe Linlin could become a God’s Knight?
I already know some of you will say “But Shiroyru, Linlin couldn’t become a HK because she’s a CD!” And for that, I’d point you to Loki (got invited despite not being a CD) and Gunko (no Saint title or surname, so probably not a natural born CD either).
So we know it would be possible for BM to join the HKs despite not being a natural born CD if the CDs deemed her useful enough, yet Carmel didn’t even consider her joining the HKs to be a possibility. As
@Elder Lee Hung and
@kurwa will tell you, the HKs are known by everyone and their grandma, so it’s impossible that Carmel didn’t mention the HKs because she was simply unaware of them. Therefore, the only logical conclusion is that Carmel just didn’t believe that Linlin had enough potential strength to become a HK.