Why do non programmers know about open source if it doesn't concern them? They don't have any benefit from an source open application besides maybe theoretically better security audits. I would arue is because people expect that you can pick it up and change the code, so it can be forked and continued in the future and also because it's usually free.

It's also not the only deceptive Adventisten. He also claimed that you can use it how you want the only use case they want prevent is injecting ads into their app. But that could be better solved with a trademark.