Final answer:
The author's overall opinion is that women's commitment to the cause is driven by a sense of achievement and endorphin-fueled feel-good factor.
Step-by-step explanation:
The concluding sentence conveys the author's overall opinion that women's commitment to the cause is primarily driven by a sense of achievement and the positive feelings they experience.
The author suggests that women engage in the cause to feel a sense of accomplishment, along with the additional benefit of experiencing endorphin-fueled feel-good factor.
This implies that the author sees the women's commitment as self-serving and motivated by personal satisfaction.