Usually you will not be informed in advance that the exact nature of the conversation at that time will be terminally dull or incomprehensible. You may desire the company, but the company may not make the point of ensuring your enjoyment of the conversation.
I'm not sure what this has to do with Frank's inability to hear conversations. As a hearing person if the conversation is boring I do have the option of introducing a new more interesting topic and participating in that discussion. While Frank may be able to introduce a new topic. he's unable to participate in the discussion the new topic might generate.