The plasticizers are in the plastics, and the plastics are in our bodies. When the plasticizers leach out of the plastics, where do you think they can go?
The point is that BPA-free plastics are used specifically in drinking bottles and the like, while micro- and nanoscale particles are liberated into the environment by all plastics - the vast majority of which, certainly all the widely used engineering resins, are not formulated on the assumption that they need to be innocuous.
(I assume that, four years after an airborne virus ran pandemic, no one need explained the inverse relationship between particle size and length of mean free path in air. I hope no one needs that explaining, at least...)
It may be true there is less risk here than some suspect, or it may not. It is certainly foolish to assume either without bothering even to investigate the question.
