When most people say they want things to be public, they typically mean "accessible to those who have a legitimate reason to access it, which may include some people I have not explicitly authorized."
Also LinkedIn does have public profile settings which allow some or all of your profile to be visible without an account.
LinkedIn is a authwalled garden only available to those with accounts. "We may or may not have a Jake Lazaroff. Who's asking?".
Sounds like you need a personal website.