But there's really not any evidence that talc for personal use actually contained any asbestos, other than some extremely vague indirect discussion of quality c

But there's really not any evidence that talc for personal use actually contained any asbestos, other than some extremely vague indirect discussion of quality control parameters and testing quality confidence. Even assuming that there was indeed a microscopic amount of asbestos in talc, you should be aware that you're breathing in probably ~5,000 asbestos fibers every day - that's about the ambient level from naturally occurring asbestos in air. If you do yard work, or you drive off-road, then you're probably getting more than that.