It's not just the marketing groups but also peer pressure. Whenever I pointed out on HN that I don't use social media or smart phones as I find them a net negative, people jumped at it mockingly, saying this is the new "I don't have a TV" or argued that it is simply impossible, etc.
Just rephrase what they said in your head as "I'm not on any major social media platforms, and I limit my time on HN" and we can avoid this conversation that happens every time we try to discuss social media or screen time on this site.
Otherwise discussion on the topic is impossible, as one can always respond with "yea well you're on HN aren't you?!"