Sorry, but this is nuts. Students in many fields do retain independent control over their own research results and don’t get them stolen by their advisors, even if the results are brilliant. Demanding that the results be restricted to “Nobel-level” discoveries seems unrealistic—how many graduate students do Nobel-level research, with or without co-authors?—but genius-level discoveries certainly are published independently by Ph.D. candidates.
I’m thinking in particular of the outstanding Fields Medalist mathematician Terence Tao, who published several major papers (with no co-authors) before and shortly after receiving his Ph.D. in 1996, and to a lesser extent another mathematician, Manjul Bhargava, with similar though not quite as renowned accomplishments.
“On average”, grad students aren’t doing genius-level work, period. IME, the few who do achieve that tend to have advisors who are inordinately proud of them and run around showing them off every chance they get and push them to accomplish even more stunning things, not jealous losers who steal from them.
Frankly, AFAICT, a truly genius-level hotshot grad student whose advisor doesn’t support him/her with integrity has plenty of opportunities to find another advisor. Students like Tao and Bhargava generally acquire quite a reputation informally among specialists in their fields even before they begin to publish, and they usually have some fairly hotshot senior geniuses who are eager to work with them. Stealing credit from a student of that caliber would be likely to cause quite a scandal in the profession.
My guess (and this, unlike the specific examples of individual cases offered above, is only a guess) about the “plagiarized-by-advisor” phenomenon in general would be that it shows up primarily among comparatively mediocre professors with good-but-not-great students, where the people involved have no academic celebrity status and comparatively little collegial scrutiny, so intellectual theft is more likely to pass unnoticed.
In the academic world, where I’ve worked in both humanities and sciences departments for the past twenty years and which is much more diverse and complex than you apparently realize, there are lots of different social models of competition and collaboration. It is simply not true that every academic department is a seething abattoir of backstabbing and throatcutting in the struggle for publishing credit, nor is it true that every academic will abandon all loyalty and integrity for the sake of getting their name on a genius-level publication.
Your boasted scandalous slanderous cynicism may be personally titillating to you, but that doesn’t make it an accurate picture of all academia.