If someone brought up One Punch Man is a comedy, would the comments say it ain't some excuse for what appears to be a mosquito mutant woman to be dressed like that or having poses like that, or having her breast shaped like that? Even if there was more ridiculous looking things within the manga? Also gotta like how the quoted Tumblr considered to stop reading it just because of this scene. There are better reasons to stop reading some stories than a bug woman losing her legs.
The racebending thing was done to non-white characters. I remember one tumblrina made a racebent human form of a horse (and got butthurt because people made her white) and another tumblrina made a bunch of Disney characters such as Mulan and Pocahontas other ethnicities. While it may of gave them some fun, the racebent thing would get out of hand if they ever saw other versions as racist, wouldn't it?