I mean,Luffy would have done it,he never leaves anyone behind. So maybe people expected the father to be more like his son. By the way the Ginny things is still a forced choice by Oda because when she was just a kid she managed to communicate with pirates,and now that she was an adult and a trained soldier she didnt manage to comunicate with the Revs for years,and also Kuma,considering his powers,could have tried the rescue alone or with some of his friends