>>124160180That's Space Beth not an a parallel Beth. She's maybe an exact replica of their Beth or maybe their Beth is an exact replica of her. They don't know because Rick randomized it then erased his own brain.
Rick & Morty both ridicules/satirizes tons of scifi tropes and also uses scifi correctly in the pursuit of ridiculing/satirizing a lot of literary tropes. Like with incest. Even though incest really is objectively bad and damages families which by extension damages society it's fine to examine that comedically and science fiction makes it easy to do so.
Like lol at R&M's face in this
>>124160059 picture where horny teenage Summer is losing her grounding in reality and taking it a little too far inside this sex-dream-in-a-dream. That's funny.