Copyright is not a tool created in the interest of producers, it's primarily in the interest of distributors.
Technology has changed for good; when almost everybody carries in their pocket a machine for creating perfect copies of any kind of information, it's basic economy that the value of a copy reduces to nothing. It's the world which has moved on, not a desire to inconvenience authors; legislation needs to reflect that change. The value of original creation is worth something, but forcing people to buy copies in order to sustain such original creation is a market inefficiency; better processes need to be found, which are more well adapted to the way people behave.
A more apt analogy to your farmer example would be if everybody would carry Star Trek matter replicators on them. The farmer would not have a right to send cops to tie the hands of everyone passing by one of their tomatoes, or near any copy of a copy of the tomatoes, so that the walker can't create a copy for their consumption and thus have no need of paying for the original.
Technology has changed for good; when almost everybody carries in their pocket a machine for creating perfect copies of any kind of information, it's basic economy that the value of a copy reduces to nothing. It's the world which has moved on, not a desire to inconvenience authors; legislation needs to reflect that change. The value of original creation is worth something, but forcing people to buy copies in order to sustain such original creation is a market inefficiency; better processes need to be found, which are more well adapted to the way people behave.
A more apt analogy to your farmer example would be if everybody would carry Star Trek matter replicators on them. The farmer would not have a right to send cops to tie the hands of everyone passing by one of their tomatoes, or near any copy of a copy of the tomatoes, so that the walker can't create a copy for their consumption and thus have no need of paying for the original.