Why Are Starfleet's Ships So.... Human?

Check these incredible artists out! Harcourt and Rockwell by: https://www.deviantart.com/terranimperial Discovery and others by: https://www.deviantart.com/captshade https://www.starfleet-museum.org/index.htm Today i look into a issue that has been knocking around since Star Trek Enterprise came out in 2001. Why is it that the many a varied races of the federation all seem to use Human style ships which trace their origins back to pre-federation earth. Are we simply not seeing these 'alien' style designs or is there a deeper reason as to why human style starships prevail?