Of course the OGs contributed original ideas. But they didn't do it in a vacuum. Einstein studied Newton, Maxwell, Boltzmann, Lorentz, Riemann, and many others before making his own contributions. Carl Sagan didn't single-handedly discover modern cosmology. He spent decades learning from and synthesizing the work of thousands of scientists.
That's how education and science have always worked. Every generation builds on the work of the previous one. Standing on the shoulders of giants isn't a weakness - it's the entire reason science progresses.
The notion that learning from textbooks, lectures, and published papers somehow makes your understanding less legitimate completely misses how every educated person acquires knowledge in the first place.
All those questions do is let me know you have no idea how the education process works...but you seem to have BIG opinions on it.