I remember when the internet started I was telling a friend of mine she should look for a new career. She works as a travel agent. I was convinced the internet would relace all those jobs. You know she still works as a travel agent.
I certainly haven't used travel agents since I became aware of Google Flight Search etc
But maybe older people / business travelers still use them for convenience?
The word 'all' is not something we should focus on. Technically if one farmer or travel agent existed, then 'all' those jobs have not been automated away. The structural integrity of society (or at least a desirable society) demands that we have some means providing for our existence at large population scales. Now it doesn't matter so much if this is a job, or UBI, or something we've not thought of yet as this should hopefully avoid a fascist collapse scenario where large amounts of unemployed people vote in or demand rather human hostile governments.
In other words -- a great business to be in!