Well, the guy you are responding to is maybe only thinking of people whose hearing is diminished in some manner. Not people whose hearing is otherwise incapacitated through something like tinnitus or like the other poster in here who has auditory dyslexia. Both of whom may be inconvenienced by headphones or earbuds and have an easier time with speaker phone than those options. Maybe try to explain how you think they are being insensitive or lacking empathy rather than just accusing them of such without explanation.