Yep I remember that Pioneer spacecraft and the image of man and woman. As I recall there were graphic depictions of both male and female nude bodies. And a map showing which planet the spacecraft came from.
I’m sure its sexist for many other reasons. One of which would be, its hetero normative and binary in this depiction of people. What about the diversity we hear about. What about lesbian, gay, bisexual, and transgendered peoples??? Why are they not represented as part of the rich tapestry of diversity the aliens will find on earth????
Wellll; unfortunately for the queers, lesbos, trannies, and all the other freaks out there, the body parts stay the same as you were born with baring surgery.