Anakin listens, even if what he's listening to isn't overly reassuring. Garth'zel is strange to Anakin, but he's at least helping Shmi and has thus far treated him well and the former is much more important than the latter in Anakin's mind.

"Would they try to kill you, do you think?" Yes, he'd said some might be the type to listen, but that wasn't really an answer, and what he's really asking is how Garth'zel thinks that fight would go anyway.