I don't think government programs should exclude males or females unless there is a strong rationale.
There is a shortage of qualified STEM workers in this country, and addressing that shortage is important to our future economy and national security. Women happen to be underrepresented in STEM, and also happen to make up over half the population. Boys have more than enough role models and mentors available if they want to pursue STEM fields. Girls have Marie Curie and... ?
The rationale of making female mentors available to girls is plenty strong.
