Cross posting to this older thread about transporters, just to add my opinion.
How does a transwarp transporter replace a starship? How does TB accomplish exploration? How does TB seek out new life and new civilizations? How does TB go where no man has gone before? Don't you need endpoint coordinates even for transwarp beaming? Finally, how does TB face and repel an aggressive invading species? Sure, commercial transportation will be laying off jobs, but star fleet is much more than just a way to get from point A to point B.