Speaking well should be a part of a business plan, as a part of supply chain for ideas. Speaking in a town hall is the essence of managing the water cooler conversations for the next two weeks.
The only reason people don't walk out on some speakers is the same reason that you eat pudding in a hospital. You eat pudding because it's the only thing in front of you. Given better options, that pudding would be in the garbage.
WHY ARE VOICE EXERCISES SO WEIRD?
Typically voice exercises engage intrinsic muscles and re-educate them, in relationship to producing your voice. Most people haven’t gotten in touch with those structures since they were about 2-5 years old, so they now exist below the level of the conscious mind. All those cute things babies do Baabaabaaa etc? Yeah, they are trying to get a handle on how to use their body, and how to produce sound, and they are working HARD to figure it out!