This is an interesting question. There are many ways to answer this question. Perhaps it is best to say that the biggest positive impact is that great music can be made with an electric guitar. Think of the great guitarists of the last century - Jimi Hendrix, Eric Clapton, and the like. Many people can benefit from this. There is something about music that touches a deep part of a person.
Another benefit is that electric guitars are louder than acoustic ones. For this reason, more people can listen. With electric guitars you can fill a stadium with music.
With this said, there are also negative impacts. For example, is a person is not a very good guitar player, then an electric guitar can amplify the poor quality of their music. This can disrupt neighbors and others.