Earlier quoted context omitted.
I doubt spammers will be the only ones leveraging AI generated text. I'm sure legit marketing people and even administrators and support staff will benefit from using AI written responses. So you're going to filter out valuable emails as well.
There are no valuable emails from 'legit marketing people', especially so if they're using AI-generated messages to hit you with a firehose.
Maybe not for you, I subscribe to brands I like.