'LLMs to send birthday messages' is the latest fascinating example of 'a thing that is useful for governments and organisations being weirdly packaged as useful for households'.
So much of, e.g. anti-fraud is going to become easier and more effective the more of it we can automate it (a lot of it is just 'we got this bit of the state to talk to this bit of a bank which talked to this mobile phone company' which obviously takes a lot more time the less automated it is.
as a developer, i do not see how llm would even enter this picture, all of this can be automated without it
the key problem with automating these is always that you still need human supervision for cases where automation goes wrong, and if anything, llms make this task harder
As a good example of this, read up what the Dutch tax services did a decade ago to families making use of 'fraudulent' child care services and how dodgy algorithms and deliberately limiting human intervention in same meant tens of thousands of people got ruined.