I disagree. The reason is that some people is not educated in async or just lazy. It takes just one person that refuses to go async to make everybody use video. I heard it thousand of times: "let me call you cause I explain better by phone"
No, you don't. You just use many resources to keep conversation going until you find terms and produce proper phrases. You could perfectly have elaborated this by your own and wrote it down in an email or chat group.
Sorry this was deep inside me and had to come out :D