The words that the acronym stand for still lose their meaning if you use them too much.
Do they?
See SJWs like to throw around "national socialist" a lot. So your school teacher is a national socialist, your grandma is a national socialist, adolf Riddler is a national socialist, some guy with cancer is a skinhead national socialist. The word national socialist is losing its meaning thanks to SJWs.
No one knows the difference from a real national socialist to some guy with cancer these days.
SJW on the other hand won't lose its meaning. Calling someone an SJW doesn't have the wide range of accusations like the word "national socialist" does.
You can tell what an SJW is just by looking at them.