Completely true. All you need to do is look around at professional associations. "Women in <industry>" abounds. "Blacks in <industry>" and "Latinos in <industry>" and "<Industry> LGBTQ+ club". Identifying with one or more "minorities" is your key to networking and belonging.

I grew tired of seeing groups which excluded me, so I joined some Irish and Scottish business networks. They are very small, and concentrate not on diaspora but on homegrown businesses in weird and disparate industries.

At least as a Catholic, I have been able to join ministries, retreats and service organizations for men.