1. What is PC or Cancel Culture?
It doesn't *really* exist.
They're both white liberal, performative pearl-clutching. Such as they do exist, they only exist to silence, pathologize & punish working class Black people in general, and Black men, in particular. And occasionaly to quietly dump inconvenient white people.

2. Who exactly has PC/Cancel culture actually harmed?
Materially? Working class Black people, but especially Black men.

3. What are the specific losses they have suffered?
Like every other form of American Liberalism, discussions about policy and how material reality shapes lives is replaced by performative morality. So instead of discussing policies to alleviate poverty, or policies that push for a familial rights to protect our communities, we find ourselves talking about celebrities and media, as if the lives of millionaires are analogous/influential to working poor Black people.

R Kelly becomes a stand in for the sex trafficking of Black girls, when his situation is miles from the norm of how our Black girls get into sex work.
The VAAAAST majority of Black men aren't pedos, but because Kells is a Black man, we all have to prove we ain't Kells to the Cancellers.

And then to show how good we are, we claim to "cancel" people who like his music, as if they themselves created the conditions that made it possible for Kellz to be foul as fuck.

But we got no heat for label heads, radio programmers, Disney, or any of the white power structure that paid for and profitted from & promoted dudes work.
And we don't even *look at* the real causes of sex trafficking and abuse in our communities.

It's bullshit