Okay so someone said it in a time when the "experiment" was slavery. I'm not sure what your point is.
Yes, it was said during a time when slavery was the norm. But the “experiment” also included allowing systems that challenged that notion rather than maintaining the status quo. That’s the point.
I don't think the idea is that experimentation is de facto bad. It's the use of experimentation as a tool to avoid implementation following experimentation that's being decried.
If someone is acting in bad faith, the fault is not in the experimental process but rather their faculty in interpreting the results. We wouldn’t throw out experimentation in science just because a researcher was biased in their result. The OP seems to be throwing out the baby with the bath water.