My GF demonstrated an aptitude for STEM at an early age. She received an enormous amount of pressure to continue down that track despite not being interested in it as a career.

Your claim may have been true at one time, but I don't think it has been for awhile now.

*Edit: In response to your paper: It looks like it's a research paper, not a study, written almost 20 years ago, referencing material that was ~10 years old at the time of its publication. It well may have been true, but the time the original research was collected (in the 90s) is about the time I'd argue a major cultural shift happened.