That's a thought-provoking article you linked. Thanks. Unfortunately, ideological purity testing is a major problem across all sectors and spans the political spectrum. I was particularly struck by the part of the article that discussed whether "marginalized" status should be considered permanent or temporary.
I've worked in social services for a long time. Social activism is a double-edged sword. On the one hand, marginalized groups need activists to push their agenda. On the other, activists often adopt that social activism as their primary identity and sometimes even their career. This sets up an incentive structure whereby they don't actually want to solve the problem of marginalization. Instead, they focus on ideological purity rather than pragmatically solving whatever problems they face.
Sexual orientation, indigenous rights, trans rights, disability rights, race, gender, even recreational drug use, are all marginalization issues that have all received a reasonable degree of social acknowledgement and formal protection.
In all the years I've worked in social services, the one issue that never goes away and is never solved or even seriously tackled is the intersection of poverty and mental illness. We are getting better as a society with treatable mental illness like depression and anxiety. However, major mental illness or untreatable/undiagnosed conditions like lack of impulse control that make it hard or impossible to work lead almost inexorably to poverty, addiction, and involvement with the criminal justice system. The activism on that front is itself marginalized because the "fix" isn't a matter of changing language or mind set, but rather a massive investment of resources. It is easier to sit behind a keyboard and advocate online for nebulous issues like representation than to get out there and make people care about issues that cost real money.
As someone who works with seriously impoverished and mentally ill people, I find the sometimes extreme drama associated with identity politics, representation, pronouns, etc. rather ridiculous. A lot of it is just people trying to externalize their personal issues and force others to acknowledge them, which is unfortunate when it poisons a project or community. It is a form of narcissism, essentially. People who do that should go down to the tent cities, homeless shelters, and jails to get some perspective on just how "marginalized" they actually are and whether publicly exorcising their personal demons is worth destroying the enjoyment of others in a project or community. Their energy could almost certainly be better spent in less narcissistic pursuits.