Someone on fedi said that ads pollute webpages and I think marketing emails are the same for inboxes. They make checking your email a massive chore when it should be a pleasant experience.

I have absolutely zero respect for most people in marketing and advertising. Their entire job is taking up more and more of our already limited attention. These people and companies compete to steal our attention away from things that actually need it, from open source projects, from work, from your personal business, and from friends. Our collective attention is worth so much to these assholes that there's literally an entire economy built around it. Most of us don't mind giving it away left and right because we don't even realise how valuable it is.
https://wikipedia.org/wiki/Attention_economy

Imagine how pleasant things could be if we got rid of "cold email campaigns" and daily newsletters and "here's what you missed!" and "check out our weekly deals!" and massive billboards on the side of the road and big banner ads on the news and three 20 second interruptions to our videos and sponsored products surrounding pictures of our friends' newborn and on and on and on

Little by little, these things actively make our lives more and more unpleasant, but because they've crept up on us and because they're small things here and there, we don't even notice them any longer.