The stereotypical male envisioned as working on his own car is a rapidly vanishing myth as less and less can be done by "shade tree" mechanics for reasons of required equipment and knowledge and for reasons of vehicles lasting much longer with little need of service.
Men also do not like admitting they know nothing about their vehicles and so they allow the duty of maintenance to fall to women, whether consciously or unconsciously, to remove themselves from failing the stereotype they can't live up to and feel is expected of them in an age where the technology is less and less in the realm of hobby.
