Exactly—it's entirely infeasible to live in the modern world and keep up with every step of the supply chain for every product and service you use, even if the information were readily available, which it very much is not. It's not even close to being possible.

That's what laws setting floors on how shitty product-safety/work-conditions/worker-pay/et c. can get, are for. Doesn't work so hot in a world where we grant MFN (or whatever it's called now) trade status to authoritarian states with weak worker, consumer, and environmental protections, though.