You're going to fall behind eventually, if you continue to treat LLMs with this level of skepticism, as others won't, and the output is accurate enough that it can be useful to improve the efficiency of work in a great many situations.

Rarely are day-to-day written documents (e.g. an email asking for clarification on an issue or to schedule an appointment) of such importance that the occasional error is unforgivable. In situations where a mistake is fatal, yes I would not trust GenAI. But how many of us really work in that kind of a field?

Besides, AI shines when used for creative purposes. Coming up with new ideas or rewording a paragraph for clarity isn't something one does blindly. GenAI is a coworker, not an authority. It'll generate a draft, I may edit that draft or rewrite it significantly, but to preclude it because it could error will eventually slow you down in your field.