True, but in the 40s, 50s and 60s, High School Courses were very close to undergrad courses now in the US.
Back then, public schools were not afraid of failing students, plus hardly anyone in high school worked after school. Typically they work at summer jobs. Also if you dropped out at 16, you could find work at a living wage, not now.
Oxford and ETH Zurich will be open for the rich, but Trumpists openly despise higher education, and I'm not sure whether any American universities will be safe if Trump stays in power for four years.
RIP US-based Academia INC
In the immediate term, obviously the center of academic research moves to Europe/Asia, but the longer term damage is irreparable.
Where is the 0-1 basic research that fundamentally moves the ball forward going to come from? Clearly not the US anymore.