How to Delete multiple contacts in my Address Book

Back in May of 2021, HectorC inquired how to delete multiple contacts from his address book and was basically told (by Xfinity Support) that you are restricted to deleting one at a time, due to a "safety and convenience feature". I find this ridiculous and would ask Xfinity Customer Support to please weigh in on this topic. If this is indeed the rationale, then Xfinity needs to modify their software to allow this convenience. To go through ones address book and delete contacts one-by-one, is counterproductive and a waste of precious time. If Xfinity refuses to make this simple and industry-accepted feature, then I will unfortunately have to dump Xfinity/Comcast and enlist with a seemingly more progressive company like Google (Gmail).