We‘re talking about wildly different things here.

• A „user“ is not the person making a server (discord or matrix for that matter)
• A developer (which are the people making FOSS projects, which were the topic) is absolutely a tech person
• A matrix bot can just be invited to your space
• Hosting your own bot is downloading a script, changing some values and starting it
• Matrix is a couple years old and written by hobbyists, discord is a for profit product with dark patterns to suck people into paying for basic features

Please dont use these ignorant arguments, its obvious that matrix is the better choice if someone can afford the time to get to know it or just joins a server.