Not like they were in a rush either, and that was only to end the trade, as the practice still continued throughout the Empire.
What you're saying is so fantastical, it goes beyong revisionist or retroffiting for the sake of a bogus narrative born out of the usual nonsense political agenda.
Even in the rare instance when you are saying something factual (for instance, in regards to unborn humans being, by definition and in accordance to basic biology, human) you have to muck it up by contorting it to suit partisan hack propaganda.
For self-descibed 'pro-lifers,' the life of the individual is expendable at any stage past 9 months of pregnancy and til they have value as cannon fodder when old enough to serve in the military. Between that it's on its own for medical assistance if needed, as well as education, food security, housing, access to jobs, right to vote, etc.
Likewise with prisoners on death row and those our soldiers risk their own lives to kill in wars whose causes and aims are not defensive. Or, as you pointed out the other day, those non-Jews who get in the way of Israeli bulldozers.
Those are the views of the Conservative, one that harkens back to Feudalism - the minions pleased with their place as serfs at the bottom and their value as nothing more than drones in hopes that in a few short generations a select few might reach the vaulted level of their lords.
Human slaves, of course, once occupied a rung lower than the peasants.
Your assertion that slavery in antiquity was nothing more than voluntary indentured servitude to pay off debt is so utterly beyong reality, one wonders if you're kidding.
Most slaves then were captured in wars or kidnapped from neighboring enemies. That includes the Hebrews, who also sold their own daughters to be sex slaves, something which wasn't intended to be a temporary position, unless the owner no longer felt she was worth keeping and thus had to release her to be free in accordance to law. As with Rome, Greece, Iran, Babylon, Assyria, Sumeria, Egypt, etc, slaves could be also born into slavery, providing that's what their parents were.
As for indentured servants sent to the colonies, transport to here was an expensive and risky proposition, as well as the added cost of maintaining them. Not many Brits were that indebted to anyone in America to warrant the need in the first place.
Indentured servants in the colonies were penal colonists, convicts, criminal class throways disposed of in a land not....