I'm on Twitter because a long time ago it was a good place to get contacts and industry updates. The only reason I'm still on Twitter is because I haven't used it in about 6 years have forgotten the password and can't log in to delete the account.
But anyway being in cybersecurity isn't about being invisible, if you were invisible you wouldn't be in the industry, you'd just be a hermit living in the woods. It's about being aware of security threats and taking precautive action for yourself and your employer. Me posting videos of my rat completing puzzles, doesn't compromise either of these requirements.