I definitely appreciate being told "I don't know", but I've found in business settings that people expect to get reprimanded for saying that more than a couple times a year, and they refuse to say it.

They will invent crazy workarounds to avoid those 3 words.

Even if I ask "Do you know X?" they will not just say "no" most of the time, unless it's really outside their wheelhouse. If they think they should know it, they'll spit out statements worthy of an LLM.

And I admit, I felt the same at first. The first few times I told the CTO (my boss) that, I cringed. But he just told me to put aside time to research it. He knew I couldn't know everything, especially about things that we hadn't done before.