Being a Bachelor of Science myself, I would want all scientific evidence before I believed this story. Just because someone tells a story, it doesn't make it fact.
In fact, this kind of thing can be counter-productive in recruiting educated folks to Sikhism. People in villages might be wooed into Sikhism by it, but in general, people should seek more spiritual or selfless fulfillment from their religion.
They should not see religion has a health insurance policy, or an investment, i.e. I pray, I will be healthy, I will be wealthy.