That may have been the case when it was written, but that must have obviously been before Jean was established as a world class empath. I find it funny that a Jean fan would like a situation of Jean being a massive jerk to somebody for no particular reason.
It hasn't been the case in a decade... because Rachel has been a mind control victim or a background character for the last 20 some odd years. When was the last time Rachel actually mattered in a story that didn't involve her being manipulated, mind-controlled, or immediately knocked out? So that's hardly a good defense.