It's more PR talk and "victim" seems to be becoming more taboo as a descriptive term. I suppose "survivor" has a braver connotation in that they can overcome the trauma, while a "victim" cannot.
Language is certainly interesting.
Not all abuse is physical, and not being physical doesn't necessarily diminish the trauma the survivor has experienced. Why is 'survivor' not apt here?
I'm not from the USA but it seems like "survivor" traditionally implies having survived a situation where the normal expectation is poor odds of survivability. Nobody's a stubbed toe survivor or an upset about the bus survivor.
I am a stubbed toe survivor! I almost died (from laughter!) the last time I stubbed my toe (fell down the stairs)
I guess they would use the word survivor to say that the person did not end up ending their stay on this earth.
Sexual abuse has very poor odds of emotional recovery. Surviving an emotional ordeal is a valid use and recognized meaning: "to continue to live after being in a ... difficult situation" (Cambridge dictionary). Example: "she survived two divorces." In this case, psychological abuse can, and often does, lead to "destruction or death," which could be a crushed self-esteem, a crippling depression or even suicide.