I agree that there should be more funds that support all kinds of backgrounds so that we can increase the diversity of people in the VC space. This reminds me a lot of the discussions about affirmative action in the US, which is divisive on both sides, and I do see a strong argument for using class as the main determinant. However, black founders often mention that they are declined funding because they don't look similar to the investors, and while most entrepreneurs need to go through a lot of investors, its often hard to tell if you're getting rejected because of your idea or the color of your skin.
Just because it would be ideal to have programs for all disadvantaged backgrounds doesn't make one specifically for POC bad imo.