Im afraid I don’t think his motivation is as noble and self sacrificing as you suggest
I don't think you're right in that assumption. Whatever you think of them (Bob Vylan is a duo not an individual) their music has always referenced social and political issues.
Musical themes
Common ideas found in the lyrics include social and political issues such as racism, police violence, economic inequality, access to healthy food, gentrification, mental health, fatherhood, late-stage capitalism, homophobia, toxic masculinity, Britain's political hypocrisy, and the pharmaceutical industry. The theme of the struggles of being a black man in Europe are recurring in every album, and include the mental health struggles of black men, institutional racism that contributes to poverty in black communities, the threat of police, and the struggles of being a black parent in a world that threatens your children.[37]
Walter Rodney, a Guyanese academic and anti-colonial activist, is featured on "Walter Speaks" and "Health Is Wealth".
https://en.m.wikipedia.org/wiki/Bob_Vylan