Dumb. Slaves were expensive. Owners wanted them healthy to be productive. Your thinking is typical of ignorant abolitionists of the time. Pushing hatred leading to a war that killed nearly a million Americans and destroyed half the country.
Slavery was an atrocity and can’t be justified, but so was Lincoln’s War.
Do you ever ask yourself why the entire western hemisphere terminated slavery without war, except the good old USA?
Brazil, who had exponentially more blacks than the US, ended slavery with the pen.