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....
It will shouldn't surprise you that not everyone in crypto is really aware of phishing mails aside from newbies, Though they're not mainly targeting crypto OG's, They're most targeted the newbies and that's why the scammers responsible for sending out this Phishing mails are not relentless in doing what they're doing, this information is very useful to newbies in the space and also existing crypto enthusiasts that doesn't know what phishing is all about.