There is a difference between understanding a thing and being able to apply what you understand to use.
When you understand a thing, it means that you have a prior knowledge of what the situation or circumstance is about, but the fact that you have the knowledge about the a circumstance or situation does not mean that the ability to make it become practicable.
People need to however understands that whatever they have the ability to understand can become applicable when put into practice and when it is properly put into use.
Some people acquire a knowledge about a particular trade but do not even know the proper way to go about it to use the idea of what they know into practice in order for it to bring something better for them.
One thing we have fail to realize is that if all humans will put the idea of what they understand into practice, we can all be able to make out something better for ourselves, groom ourselves and as well make our community and even make the world a better place.
If more people can use their knowledge acquisition into something actualize like the setting of new industries, it will reduce the level of unemployment in the country.
Instead of just keeping all that you have learned at a corner of your mind and sleeping and waking up with it without taking any practical step to bring it into actualization, change your mindset because it may be that your idea is what the entire world is expecting.