I wish there was a way to never accidentally click on or navigate to the feed at all on LinkedIn. Could be a good opportunity for a browser extension to just nuke that part of the DOM.
www.linkedin.com##:matches-path(feed).scaffold-layout__main
www.linkedin.com##.global-nav__primary-link.global-nav__primary-link--active.app-aware-link
The former will block the main content of the page while on the /feed/ path, while the latter will block the "Home" button in the header nav.