The danger comes more from inhalation of particles that break off. The asbestos fire gloves contain the asbestos laced fabric sheathed inside cloth material to help contain the particles. They're also considered consumable, because handling something on fire will likely destroy the outer fabric (for example, a lithium battery powered device combusting, and placing it into a fire-safe bag).
They're only almost-as-good. Nomex is great against fire, but it melts around 250 C, which asbestos (being basically a rock) doesn't. I'm guessing that if you're in a big metal tube surrounded by metal parts that you may need to touch for a while, 250 degrees C is not all that high.
Interestingly, with how tightly asbestos is regulated nowadays, it's not really all that cheap. Assuming you don't buy them directly from kazachstan, asbestos gear is pretty expensive.
If you mean pure latex gloves, you should be fine. Latex starts to melt at 180 degrees Celsius. Meaning that if the gloves are melting, your hands would have been fucked with or without the Latex.