The Three-fifths Compromise applied to slaves, not free black people.
Sadly, in a time when nations across the entire world owned slaves, a region of America also owned slaves. For about 90 years of US history, 1.5% of Americans participated in the African slave trade that spanned from the Middle Ages until 1981.
 

Also sadly, in a time when slavery itself was still legal and happening Morocco, China, Turkey, Ethiopia, interior African nations, and the Middle East; we were dealing with some awful Jim Crow laws.

Not a single day goes by (or even an hour, I'd bet) that Americans don't argue about it with shame. I don't think any other country (many of whom were worse) gets off on doing this like Americans.
 

As such, yeah. In a time when black slaves were routinely castrated outside of the US, there was a debate here about how to count the census. No real reason to avoid discussing the 3/5ths compromise.
 

Women have been entrepreneurs and owned businesses since the founding of the United States. Same for black people. At the founding of the country, the right to vote was restricted to "gentlemen of property and standing". Prior to the Civil War, free Black people had suffrage in New York, New Jersey, and Pennsylvania..

There has been bigotry and people fighting bigotry every step of the way.