Much of the forced and child labor used in solar panel production, mining, and transport, as with everything else in China's production systems, goes completely unacknowledged and unaccounted for in these navel gazing expeditions.
With all those corners cut to mass produce cheap materials like batteries and solar panels and computers and so forth, China is able to undercut production that utilizes ethical and sustainable production. I don't think you can look at China's production "costs" as legitimate data, and the problem doesn't seem to be one that anyone outside of China will ever fix. The extent of the influence the rest of the world has over the problem lies entirely in our ability to not do business with China.
When you look at all the savings you get when buying electronics and solar panels and infrastructure related products coming out of China, you're getting a human suffering discount. I don't think it's a good thing to include those numbers when considering long term things like fossil fuel dependencies and so forth - let's not bake in the human suffering discounts and at least try to price in human rights and humane labor practices.
It turns out a lot of things are way more expensive when factory workers and shippers and everyone in a supply chain get paid fair wages and work fair hours.
This isn't to say anything in favor of fossil fuels, I just think the immediate plight of China's factory workers might be an important factor relevant to the actual costs in play.