Earlier quoted context omitted.
Not having a bug bounty or dedicated email address does not make it OK to go public immediately
Discovering a bug that could put people's lives and/or freedom at risk if they don't do something about it makes it okay to go public immediately. That said, by all means notify the maintainer/vendor as well. It should always be assumed that someone else (if not several someone elses) have already discovered the same flaw and are currently taking advantage of it while users remain totally unaware of their actual risk…
That's not what they said though. They said "please consider notifying the maintainer/vendor before publishing your findings, even if you intend to publish right away" (emphasis mine)