This "expert" must be thinking that his fingers aren't worth the $5 it takes to buy a set of push blocks. The problem is that the cutter might grab the wood and shoot the board out from under your hands. Now if your hands are over the cutter at that time guess what's gonna happen. Remember this machine doesn't slice off fingers that can be sewn back on. It makes hamburger! Beyond that he has no eye protection, no respiratory protection, no blade guard, long sleeves that could get caught in the blade. Of all the safety precautions he should be talking about, he focuses on hearing protection. That's still important but probably the last precaution you should be worrying about.