You misunderstand. I'm not saying you can't try and change things, that's exactly what I am saying. You can't demand everything has to perfect right now, you need to actually start the change somewhere.
>"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.