Better than who you know

The old-boy's network is powerful indeed, an unfair impediment to those that would seek to make a contribution, but it can be defeated with a combination of:

Skill (the result of practice and effort)

Technique (developing a point of view)

Extraordinary effort

Charisma (the confidence to care about connecting with others)

Passion

Generosity

Experience

Risk-taking (and not being confused by false fear appearing real)

Persistence

Consistency and keeping promises

Honest storytelling

It would be fair, efficient and honest if everyone had an easy introduction and got the benefit of the doubt. Until that happens, though, outsiders of all kinds will have to rely on all of these skills instead.