There is a large difference between flexible work and under going a life changing event during the development of the business.
Given a situation where you were picking between two individuals for a co-founder or other critical role, equally qualified, one telling you they are free and clear, no outstanding obligations for the foreseeable future and the other saying "well, there is a good chance I'll be heavily engaged in an outside issue for a couple months next summer", which would you choose? Disregard all gender / cause for the issue.
Given a situation where you were picking between two individuals for a co-founder or other critical role, equally qualified, one telling you they are free and clear, no outstanding obligations for the foreseeable future and the other saying "well, there is a good chance I'll be heavily engaged in an outside issue for a couple months next summer", which would you choose? Disregard all gender / cause for the issue.