> I'm listing supporting facts for why it's insane to let less than 1% of the population to dictate something for everyone else.
I would argue that there are less than 0.01% of email users in general that own or manage private or commercial distribution lists. Expecting that owners of those lists can dictate to users how the owners can access users limited attention is even more ridiculous.
Either way, you are still attacking or insulting not only your users, but also all of the people who may have or will receive unsolicited email address from a service adjacent (in a shared cloud service sense) to yours.
> Email. Not marketing email.
It appears you believe that there is a distinction. It is still a marketing email because you are using email to drive engagement or deliver service. Marketing isn't limited to a direct offer of a product or service, especially if you depend on those emails from growth or retention.