I definitely recognize what you're saying and it's fantastic, but hiring managers and execs do indeed need to be active on this too.

The channels to reach out to more diverse candidate are more often than not different to those recruiters use to find your "average white guy in a hoodie". That's decreasingly the case for women (and I use that term very intentionally; I'm not talking generally "non-male" here), but social media and professional networking is quite hostile and/or intimidating to other groups. While the business benefits of putting in this extra effort in are obvious (it's a no brainer to seek out overlooked top talent, let alone the benefits of culture and diverse experiences), those benefits aren't always aligned with the hiring team who are incentivized in most companies to hit numbers. The business goals need to be driven from above by DEI initiatives or - if not - hiring manager allies who'll put their foot down.