No, Challengers is not based on a true story. It's more of a fictional tale crafted to entertain and engage the audience, though it could draw inspiration from real-life experiences in a general way.
I don't really know. Maybe there's some truth to it, or it could be completely made up. It depends on how the author came up with the idea and the creative process behind it.
They are compelling because they are real. People are often drawn to real - life stories. For example, when we watch a movie like 'Erin Brockovich', which is based on a true story, we know that these events actually happened to someone. It gives the story more weight and makes it more relatable. We can see the struggles and triumphs of real people and it can inspire us in our own lives.