I guess you know more then the NIH. You arent going to get sick just putting your hand in the tank or even touching them. You need to inhale,ingest it, or literally try to get the poison in your blood stream through a cut in your skin. There are many videos of people touching them, new,advanced, aquarists with bare hands, they don't die, it shouldn't harm you. As i stated, you literally would need to try to like squeeze the zoa/paly into a cut and try to hope it has enough toxin to harm you. Or as someone else here posted, had a cut and scrubbed rocks in the tank allowing it to build up from destroying them all at once. I stick my bare hand in my tank all the time, you will be fine. There is a reason these are considered a beginner coral, and almost killing you just for touching it, would highly go against that. With all that said, when fragging be careful, wear eye protection, wear mouth protection, cover any large cuts and you should be good.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5099280/