It doesn't really add anything to this conversation. "Blame Capitalism" is all the rave, but it doesn't really fit with this argument. There is a lot going on here. One, this is a letter to Facebook when it really seems to be the contracting agency that's at issue. FB may just order their contractors to be like "stop this shit" and they comply, or they buy out the contract and move people in-house.
People only have so much time and capacities. A software engineer isn't going to spend a lot of time on the sales room floor, but they might have started off in help-desk support. A CEO might not know what goes on in the warehouse, but he or she may have worked at a McDonalds growing up. If someone hasn't worked entry level jobs elsewhere, would working on the factory really develop empathy? Would that change policy? Probably not.
It's so easy to make two boxes, one for the oppressor and the other for the oppressed, and place everyone into those two boxes. If each oppressor works a day in the shoes of the other box, does that make a difference? If the workers throw their wrenches into the gears and seize the means of production, what if they're completely unprepared to keep that machine moving and end up with famine?
The issues are complex, much more complex than "Before you get your license, you should have to ride a bike on the streets for two weeks."