Ask HN: Why is the internet so walled off

I used to be a believer in the gospel of starting a tech company preferably a Saas app company being a great way to make money because of the possibility of reaching a very wide audience, and sadly that has turned out not to be the case anymore and from my experience this is mostly due to its ability to wall off people and create a sense of being in a vacuum to an individual, I mean when trying to make a sale in real life I could perhaps walk up to a individual in person in an appropriate environment and try to make a sale to him but on the internet there is no such thing you have to pay for google or facebook ads for very miserable conversion rates. I really am starting to regret going all in into the online business outreach hype