I hear what you're saying, but that is exactly why Discord is shit for official communities like in the meme. There's no reason why an open source project should rely on Discord for troubleshooting and feature requests and enthusiasm. Discord was meant for things like video games and friend chats, not instances where data discovery is paramount to growing the community.
There is a reason thar Discord communities trend toward toxic, and it is the insular weirdness that the platform enables and reinforces. Forums make much more sense for projects. Discord ends up with a bunch of no lifers ruining the communities. Been through it far too often with things like genre appreciation groups to open source projects. Reminds me of being a kid and encountering the, frankly, losers chasing people out of IRC.
They hook you into an ecosystem. That's it, thats the game. I don't think it has too much to do with insecurity. Group chats and video chats with people outside of imessage is awful. Group chats lose a lot of features because SMS was all there was for a long time. Standard (not Google-ified) RCS is still too bare at the moment so I don't think the looming rcs fixes that aspect of it.