It's worrying that the social services are so underfunded they need to resort to this, although I think there can be positives.
As an extra on top it can be useful. For example, DH works for a computer game company and their community managers have been using AI to analyse threads on the fan forums, subreddits etc to find out what kinds of problems, suggestions, complaints, confusion etc people have about the game and they can then use this to inform what changes they make. Previously the community managers would read and get involved in some fan forums but it would be more than a full time job to read every single post ever made about the game. Whereas the AI can do that 24/7. So as well as the actual human involvement in the community, the company has the info of what discussions are going on as well.
So for example, for social work, if a human is minuting the meeting but then the AI looks at the transcript and makes its own summary and this is compared to the human-made minutes, that makes sense because it's extra on top, and the AI might pick up on things that the human missed.
Whereas if the AI is replacing the human minuting then you don't know if it's the one missing things. Also, I would be concerned in sensitive areas like social work that AI tends to perpetuate human bias - whereas (you would hope) actual social workers are more trained and experienced to see the nuances of a particular situation. Social work has an overrepresentation of families who are low income, BAME, single mothers, mental health difficulties, low education etc. It is crucial that they are treated fairly and not held up to classist, racist, sexist, ableist norms. (Of course, I know this doesn't always happen anyway. But good social workers ARE aware of these biases and work hard to counteract them - AI would not necessarily have that lean.)
I don't see a problem with AI drafting letters - this tends to be good - as long as a human checks it for accuracy and mistakes particularly with the most important points. Different LLMs do better and worse at this. GMail has just added one and the summaries it gives me of email chains are usually inaccurate - it's not useful at all.
To me it's more of an indication that social services are underfunded as said - it doesn't matter in the slightest if a video game makes improvements which don't please all of the players. Whereas mistakes in social work affect people's real lives deeply and can cause or prevent trauma or even death. We should be funding them adequately so that humans can do the job well, rather than needing AI to do it (though maybe - just maybe - it would help in the sense that one big complaint of jobs like social workers, teachers, police over recent years is that they have to spend more time on paperwork than actually working with the people they want to make a difference with?)