Now I'm curious: why? Not that I don't believe you, but I'm wondering what is the reason? It's not intuitively clear why gloves would make it more dangerous, even knowing that it is.
If a glove comes into contact with a spinning blade, there is a good chance it will pull the rest of the glove, and the hand within it, right into the path of the blade.
DO NOT use gloves with a table saw, jointer, etc
There are exceptions, but if you want a simple rule: DO NOT use gloves with power tools
It is extremely dangerous. You can take an injury that would've been a nick on the finger and turn it into a lost hand.