Parallelism : Confusion in concept

I was going through one sentence in MGMAT SC book in Parallelisn Strategy Chapter. It was like
Wrong : Ralph likes both THOSE WHO are popular and WHO are not
Right : Ralph likes both THOSE WHO are popular and THOSE WHO are not.
I agree to the fact that second one is right but I also see there is nothing wrong with the first one if we see the same sentence like this
Ralph likes both those WHO are popular and WHO are not.
I just want to know how we actually divide this sentence. Why can't this sentence be right
Ralph likes both those WHO are popular and WHO are not.
"those " can be common for both the relative clauses.