My post was removed by a moderator because they didn't like me talking about your puppy and mine.
The biggest problem I have with Siri making calls when I don't want it to is when I'm talking to my (now 5yo) dog. Because we did so much training when she was a puppy, I sort of speak to her a lot when we are out walking. Somehow, Siri gets the idea that I called it if I say "sorry, short walk today" or any of the million other reasons why might have to say sorry to your dog. We also have a command "safe" because she gets scared of bikes, and this command cools her down. Because of the ambient noise of motorbikes and me saying "safe", Siri often activates; in both these circumstances, because it's listening to whatever nonsense I've said next, I get random calls.
AirPods are pretty bad for Siri as a whole; The number of times I say "Siri send a message to John Smith" and it responds "Just to confirm, you'd like to call David Alexson" (the only time it confirms).
I actually think Siri has really useless for using in these circumstances, but for some reason I persist...