Earlier quoted context omitted.
Are you claiming the U.S. founding fathers had an adversarial role in establishing democracy?
If by "democracy" we mean "a certain privileged class of humans have shared influence in their government, usually by voting," then the US founding fathers were rather late to the game - plenty of republics had that already. If by "democracy" we mean "there is no privileged class, and all people born in the land can vote if they are of age and have not had their privileges removed by due process of law," or we mean "…
While accurate, your point on slavery misses the point too. The parent comment was implying that significant democratic progress was made despite contentious disagreement on important issues like slavery.
Your "in spite of" comment comes across as if it's saying "their system was flawed, therefore it didn't make any meaningful contributions and society would have been better without it". Don't let perfect be the enemy of the good...
This exemplifies the parent comment's original point about Google's AI ethics committee of throwing the baby out with the bathwater because they were unable to meet the expectation that everyone agree on everything. If that maxim isn't met, they just take their ball and go home and the overall system is no better than when it started.