I think the recent advice is simply saying that your waveform, into a 10 mohm load (probe),
isn't as valid, as a 10k or 50 k ohm load (body).
That being 200 to 1000 times lower of a load.
So, maybe try to see what the waveform shows, using a realistic load, 10k to 100k. That likely will drastically lower that 300 volt reading.