I'm interested in being a pilot - but I lack any of the education or credentials to actually become a pilot. So my interest compared to the possibility of employment would be meaningless.
How many of the females are interested in Engineering but majored in Gender or Women's Studies and effectively slashed any chances they had of working as an engineer? Surveying for level of education and major (if applicable) as well as previous work experience would make the apparent disparity more meaningful. Now, whether or not their choice of education (and thus chance of employment) was due to a gender bias or gender discrimination is another question.
[0] https://www.asee.org/papers-and-publications/publications/11...