What is ironic about the author's description of the house as on a “mechanical paranoia”?

In Ray Bradbury's story "There Will Come Soft Rains," the phrase "mechanical paranoia" is ironic because it suggests that the house has a kind of fearfulness or vigilance, as if it is alive and capable of human emotions. However, the house is just a machine that follows its programmed routines without any real awareness or understanding. It continues to function perfectly despite the absence of the family it was built for, highlighting the irony that a lifeless structure is described in a way that conveys feelings of anxiety and concern, which are typically human traits.