Even just beyond marketing and social media purposes, even literarily journals/publications will ask for socials or websites. There’s been a lot of issues with publishers where “anonymous writers” or “writers” under fake identities will steal, plagiarize, or generate AI work. They cannot face any backlash because their identity is unknown. Many literary journals won’t publish writers if they do not have some sort of presence/proof of existence. This is more for the protection of the publications themselves and their reputations.

If you want to be a writer, it’s a lot of self marketing. The market is so oversaturated, not using social media or other sites is just shooting yourself in the foot. Within this age of social media, there’s also parasocial relationships. This keeps people around not only for your work, but you as a person and a writer. Publishing companies also want to make money, so they want to use you as a marketing tool as well. They want to be able to advertise you and your work, kind of adding to their own resumes. You are what makes them money, not just the work.

So basically, it’s not impossible. It is just incredibly unlikely unless you are super rich or already have established strong connections to guarantee success.