It can also be educational. For instance, if a documentary has a 'glow' that makes it more engaging while being based on real events, it can teach people about history, culture or social issues in a more interesting way. People are more likely to remember the information when it's presented in an appealing, 'glowy' way based on a real story.
Emotional connection. A 'glow based on a real story' can create a strong emotional bond. When we see or read something that is based on real events and has that extra 'glow', it can stir up our own emotions. It might make us feel more empathetic towards the characters or situations in the story, as we know it's not just made - up but has a real - life origin.
Authenticity. It gives a sense of truth. When a work, like a painting or a story, is glow based on a real story, it can resonate more deeply with the audience or viewer. They can relate to it on a more personal level because they know it has roots in reality.