Not just writing, but reading and comprehension. LLMs are a life-changing technology for a very large proportion of the population. Tens of millions of Americans are functionally illiterate, but are forced to go through life in a world that at best wasn't designed for them and at worst is actively malicious towards them.

A lot of people will look at a credit agreement they're about to sign and have no way of knowing whether it's a fair deal or naked exploitation that will financially ruin them. Thanks to LLMs, they can now point their phone camera at it and ask "is this a fair contract, or am I being ripped off". The LLM will give you an answer in speech and happily go back-and-forth with questions and clarifications for as long as you need. Whether the LLM is 90% accurate or 99% accurate at that task isn't truly critical, because it's a vast improvement over the status quo. Modern life is full of tasks that are utterly trivial for people in the top 10%, but a fraught ordeal for people lower down in the distribution.

To paraphrase a very old adage: God created man and Sam Altman made them equal.