I think you could certainly argue they'd have been abolitionists if they weren't mostly rich hypocrites but they quite literally took the next step on the ideological evolution that led to socialism.
The rise of liberalism was radical in a world of absolute monarchies. The rise of capitalism was radical in a world of merchantilism and protectionism.
Demanding that people who lived in that world just invent socialist thought is about as reasonable as me demanding that you personally make the final breakthrough on fusion reactors.
Even if you were capable of being a part of it, at this point in time you are working on the technology that will enable those future discoveries.
Later thinkers will build on your work. Marx both criticised and built on the thoughts of Smith and Locke.
You don't understand the test if you think it's all literal and "about circling the letter."
You would, in fact, get failed by the white eugenicists giving it to you the moment they figured out you were autistic.
One of the reasons they would know is that you think there are objectively correct answers to all of the questions and that most of them are not traps to allow a biased test giver to fail you and pass someone else that gave the same answer.
If only it was fringe