"It would be nice to abolish slavery but our current economic system isn't even remotely close to being anything like this. It would take generations of change..."
So we should prefer generations more people be subjected to these horrors than take a risk and make an effort to do better?
>"It would be nice to abolish slavery but our current economic system isn't even remotely close to being anything like this. It would take generations of change..."
This is more like you saying we need to have equal rights for everyone in 1800 before you start working on abolishing slavery in the first place.
There comes to a point where you need to make strong demands if you want to make any progress at all for certain things. Demanding incremental progress for things like slavery in the 1800s leads to half-baked compromise that ultimately led to even more issues later down the line.