I'd love to see anyone building Grokbot or ChatGPT Work talk about how they're thinking about this use case, specifically. It seems greatly important and tractable given how little government websites & forms change over time.
On the other end - yes, it will create massive vectors for abuse & fraud, since govt services are designed to have roadblocks to reduce usage. But fraud has always been possible, even without AI (so many recent examples to pull from).
IMO it's best to maximize social benefits to see where the tradeoffs really are. We won't know until we push on it!