I suspect that the risk he is talking about is probably far greater with the Onzow if one has to bring it up to the cantilever by hand! Since I am not doing that, I feel a lot more comfortable with the product.
Davey, did you ask your dealer this question about which method is more risky? Without knowing, perhaps you are just assuming there is a difference in risk and that bringing the Onzow up to the stylus is worse. I asked Larry (Astrotoy) how he used his Onzow during his monutental vinyl ripping sessions and he replied that he lifted the Onzow up to the stylus, which is what I also do. Neither of us has had any issues.
It would seem to be more risky to bring the Onzow up to the stylus, but we don't seem to have any data that supports that assumption. Did you ever ask your dealer on what he is basing his warnings and recommendations to you?