I think we're actually overall aimed at similar things then, I'm just emphasizing the need for the integrity of university admissions processes as it's pretty easy to dismiss that as elitist gatekeeping as the initial excerpt in this thread somewhat did (and admittedly sometimes it is - but that is not its raison d'etre). Primary education will never be "fixed" - but it is the right place to try to make most of the progress needed on these underlying issues.
If what you're talking about is more (robust/tested) MOOCs as a way to qualify for higher education, more structure/accountability for self-directed learning/availability of material, and a wider funnel in terms of more vocational education/opportunities - I'm absolutely on board, and would see those as suitable improvements to primary education. I'm just giving you a heads up that, in the US at least, most actual initiatives that try to "spread opportunity" don't do any of those things (too much work/investment needed), but really do just push for lower bars in higher education (wider funnel in terms of "let more people in to the thing we're doing anyway") and result in dilution of material. And yes, that does harm the value of the degree, as demonstrated also by jobs now looking for graduate degrees when in past undergraduate would have sufficed.
This is absolutely an area where the US could stand to learn from the standards and practices of its global peers. Sadly that is unlikely in the current environment.