Because you've read testimonials of people who say they've been discriminated against and you haven't casually dismissed them all?

As a white, middle-class male developer who hasn't ever been discriminated against in my entire life I find it hard to empathise with people facing discrimination, but that doesn't mean anything as all the evidence makes it abundantly clear that they do. I hadn't seen it first hand until I heard a manager at a relatively big company talking about how he wouldn't hire women because they'd be a distraction to the rest of his team. If you can ignore the weight of all that then you're quite a big part of the problem. At some point you have to stop dismissing people and start trying to understand what's going on, and try to help make the industry better.