"No creo que puedas nombrar muchos grandes inventos que hayan sido hechos por hombres casados."

Simplified Meaning:

Often, big discoveries and inventions are made by people who can focus all their time and energy on their work. Married men may have more responsibilities, like looking after their family, which could limit the time they can spend on creating new things. For example, think about Thomas Edison, who invented the light bulb. Edison was known to work long hours, even to the point of sleeping in his lab, which might have been harder to do if he had family duties. This isn't saying married men can't invent; rather, it's highlighting how the freedom to fully dedicate oneself to a project can lead to great inventions. Applying this idea means understanding and possibly organizing your responsibilities in a way that allows you to focus deeply on your goals, whatever they might be.