I only used the two together to give an example of how something so ingrained in society, economy, social acceptance, can be changed as human intelligence and awareness increases over time.
Slavery wasn't socially accepted though, it happened, many people even at the time campaigned against it, it was utterly disgusting and it was a crime against humanity. It certainly wasn't the "norm" in most corners of the World.
Hardly the same as a nice glass of red with dinner, or a couple of glasses of champagne on a first date. Or an after work couple of beers with your colleagues.
One was utterly horrendous, they other has many benefits.
And how many slave owners or traders were there really? To compare it as some kind of norm? I mean, just 5% of people in the Southern States were slave owners and for a short period of history, compared with 10 million years (dating back to pre modern humans) and 66% of all American adults that consume alcohol.
It’s a shit comparison whichever way you paint it.