Well I can't say for all though, but someone who is elite in the crypto space and understands how important their keys are, they won't be so stupid in sharing it to an email no matter where it's coming from.. the phishing scheme is becoming something else especially with emails.. fact is a good number of people still falls victims to this and the best way to prevent this from happening is to let them know that such things actually exist. I'm happy that trezor shared this as well..it shows how reputable they are and would be in the future....
Although, newbies are the most easily category of people that fall for scam like this but even a number of elites in this space sometimes get carried away and end up losing their funds through a similar strategy. At times, it's due to desperation when certain mistakes already happened and in attempt to stop further occurrence, you end up making silly mistakes that lead to more damages. After all the warnings and danger of sharing our keys with others, it's very unfortunate that some people are still not rigid in keeping this practice. Like how will someone convince me to share my private keys in the first place?