Because he naturally assumed that you were attempting to say something relevant to his own claim rather than a complete non sequitur. Maybe in your head you intended to somehow make the point that they're not using the gift as bait but you didn't say anything of the sort so it wasn't your point as written. You also said nothing about humans and moose both being large land animals (and from the Orca's POV it's not likely that it considers humans to be land animals) and that therefore yada yada ... none of this was expressed.
(I see quite a bit of this, where someone is called out and then they say "my point was X" where nothing they had said previously expressed X.)
(I see quite a bit of this, where someone is called out and then they say "my point was X" where nothing they had said previously expressed X.)