Denny's tries a joke post about soaking your contact lenses in coffee and someone pointing out to be careful with that stuff because people believed they could drill a whole in their iPhone to get the earphones jack back.
I think it has to do with how Odin saw them. Odin saw Hela as a tool for conquering. Odin saw Loki as a tool for peace with the Jotun. Taika may have meant to highlight that they were both used by Odin with different results by having them look similar.