Whilst I mostly agree with you, what I use Twitter for, and now Mastodon, is to get updates on projects and events. I follow projects like Asahi Linux (where devs post updates from their personal accounts), or various service providers or trending hashtags to get real-time updates on events, such as say an M365 outage, a zero day vulnerability, or a natural disaster (eg: earthquakes). Sure, there are other sites as well that report on events, but these sites mostly get their updates from Twitter (and not having an account on it would exclude you from participating). Thanks to Twitter, I’ve been able to interact directly with developers, netsec folks, organisations and just randoms from across the world - all of which, has been convenient to do so via a single platform. It’s kinda hard to replicate that sort of interaction across other platforms.