Yep, I installed and terminated thousands of miles of that toxic cable back in my days, when I was working for AT&T it was well known that there were vast swathes of our older areas where the aerial cable was lead-sheathed. Not only is it a health-hazard, but it's also cr-p cable that doesn't work well for anything beyond POTS. They have strung up a lot of fiber on those old poles, but as far as I'm aware they left the old lead cable in place.
The garbage about it not being an issue due to coatings and whatnot is just that, garbage. This is ancient cable that has been left to rot. It gets damaged, it gets burnt up in fires, it definitely gets into the environment.