There isn't a particularly good answer. There's no ethical consumption under our capitalist system.
I mean you don't even need to bother with the slavery argument.
Has anyone on this sub considered the vast number of things that use animal products in this society? Have they boycotted ALL of them?
To name a few.
There's more beyond that. It's almost impossible to buy anything in our society that doesn't impact animals or the ecosystem in some way and usually through death.
That doesn't mean you shouldn't try, veganism is a good thing but it's impossible for anyone to be ethically perfect in our current system as literally everything we purchase or consume involves some form of exploitation of animals or human beings.