If you are sending good mail to a double-opt-in, highly intentful marketing list, then you will receive minimal spam complaints. If you are sending to people who don't want it (they didn't check the opt-in button), it doesn't muddy the water because it is spam.
That being said, there are legal requirements (CANSPAM) [1] for mail senders around the unsubscribe link, but there are no legal requirements around the report spam button, so either kind of works.
[0] https://support.google.com/mail/answer/6254652?hl=en [1] https://www.ftc.gov/tips-advice/business-center/guidance/can...
You’ve described what happens when you report spam, but not what happens in the future when more people get upset over email and reflexively report all marketing email for accounts they chose to sign up for, and opted-in to marketing email for (by agreeing to the terms), and potentially still need transactional emails for. The average person doesn’t know the difference between transactional email and marketing email, and if you follow @Old_Thrashbarg’s advice to report any email you didn’t expect as spam before adjusting your settings, then eventually we might lose those settings as companies and providers all come to the conclusion that people can’t be bothered.
You’re also suggesting that there’s some broad segment of good marketing email that people don’t consider unsolicited or even spammy, which is by and large not true. There is practically no such thing as highly intentful ads that most people want, aside from the occasional short-lived viral campaign. By definition, marketing is a push initiated by the company to sell their wares, and most people would prefer not to watch ads given the choice.
Don’t forget that Mailchimp, Mailgun, Gmail, Hotmail, and almost every other service you can name here is actively making their income from email marketing. As much as we want to, it’s going to be difficult to block all marketing email, and they all have a vested interest in delivering email, especially from the people who are paying for the service.
What I find most interesting about email is how some people will mark email as spam literally months or years after we sent the original email. We send over a billion emails a month (not spam) and people’s behavior around email is fascinating.