I agree with you. But you do realize that it's been like that since about 20 years now. It started because of Microsoft (proprietary software), then Google (propriteary platform), now ChatGPT (proprietary knowledge).
And I tried to tell my kids. And it failed mostly.
But in the long run (a decade), what is exceptional and proprietary will become common FOSS. And everybody will benefit.
I envision this as an ideology. We don't need every kid to follow it, and I don't expect the majority to follow. A 1-2% is good enough. That's why giving speeches to teenages might be the best bang for the buck. There are always kids who need to escape into some cool ideas and it could be the idea of FOSS.
And I tried to tell my kids. And it failed mostly.
But in the long run (a decade), what is exceptional and proprietary will become common FOSS. And everybody will benefit.