Aren't you significantly more efficient than the travel agents of the 80s?
So, your single-person living has removed the need for 10 or 20 (or 50?) travel agency folks of a previous non-Internet 'must visit that travel agent around the corner to get my trivial purchase Thanksgiving tickets' world.
Which represents progress, are you really missing out on anything using the internet and being shown all the best deals available and all the information a travel agent would have provided.
Employment for the sake of employment isn't the answer, all throughout history people have done things in the most efficient ways available to then, just for most of history this involved a sizable labor force.
So, your single-person living has removed the need for 10 or 20 (or 50?) travel agency folks of a previous non-Internet 'must visit that travel agent around the corner to get my trivial purchase Thanksgiving tickets' world.