About Delia's Chicken Kebabs!

Why in Delia@s recipe: Marinated Chicken Kebabs with Whole Spices from Delia's Complete How to Cook. Serves 4 does Delia add bayleaves to the kebab stick when they are not going to be eaten and will only be under the grill for maximum 20 minutes? I wouldn't have thought the flavour of the bayleaf could permeate the chicken in such a short time. I've only ever added bayleaves to soup stocks and casseroles. I know you don't eat them, not because they are poisonous, but chewy and not particularly nice to eat. Thank you and stay home and safe and well. Thanks.