Microsoft’s excuse is that many of these attacks require an insider.

Sure we made phishing way easier, more dangerous, and more subtle; but it was the user's fault for trusting our Don't Trust Anything I Say O-Matic workplace productivity suite!

Edit: and really from the demos it looks like a user wouldn't have to do anything at all besides write "summarize my emails" once. No need to click on anything for confidential info to be exfiltrated if the chatbot can already download arbitrary URLs based on the prompt injection!