I'm on our cybersecurity team and our last phishing sim was so real looking and legit sounding I thought it was real, and I knew the phish was coming. The only indicator was the sender email was a slight misspelling of Microsoft. I pointed out that that phish is not a fair phish, our users are not going to meticulously examine every email for microscopic indicators. Half if them are barely tech literate, but they're doctors or nurses and only know what they need to know to do their job. Our cybersecurity lead was completely in "wtf are you talking about? From Micrasoft.com is totally illegitimate" mode, I had to point out that our users flag 70% of the emails as phish, and phishing tests that look like completely legitimate emails aside from a single character out of place in an obscure location most of our users aren't even thinking if looking at undermine legitimate emails and increase our workload b/c we've trained our users to think every email is a phish test from cybersecuriry.