I disagree with and reject both premises of that statement.
a) I am not convinced Harper (or Ace Bailey) have the best pure talent. Sellers was considered one of the top 5 or 10 high school players in the entire country - and played like it all 4 seasons.in college. He was as highly regarded in high school as was Harper and Ace Bailey - there just was not the publicity machinery then as now. And though Bailey was a very under-recruited player, by the time he was a Sophomore, or certainly a Junior, his pure talent was obvious to the entire college basketball world: He was a freak athlete at 6'9" - in an age where 6'9" players did not have the quickness and overall athleticism common now for that height. James Bailey was an anomaly with his athleticism at that height ... no one in college during his last 2 seasons combined his height with his athleticism.. There were players with greater athleticism - but they were all 6'5" or shorter (like Louisville's Darrell Griffiths), or guards. There were bigger players at PF and C - but none had James Bailey's hops or quickness. I think as a Junior James Bailey led the team in points, rebounds, blocked shots and steals. No other NCAA player offered that mix of both scoring, rebounding, and defense.
b) And when Sellers entered RU he did NOT have more talent around him. In his freshman year, the best scorer was Somogyi - basically Acuff, with less athletic ability. Gene Armstead was the center - a fine low- to mid-major center (was he more talented than Sommerville? Not really, though he was a Senior that season). Mike Dabney was a fellow freshman - not as "talented" or well-regarded as Ace Bailey. And there was literally nobody else ... Vinnie Roundtree as a JR? Kleinbaum? Palko? Snodgrass? And the next season, Eddie Jordan did enter - as a freshman ... but Armstead was gone and Roundtree was the starting center at 5'5", with Les Casson (a huge bust - only played 13 games), Palko and Scherer as reserve centers.
c) James Bailey had a LOAD of talent around him as a freshman - but he was only the 5th best player on that team (the Final Four team). By the time he was a Junior, here were his teammates: Hollis Copeland (a college star, true, and an NBA player for a couple of years, though only as a deep reserve), Abdel Anderson, ... and ... the guards were Rodney Duncan, Tom Brown and Hefele ... the reserve forwards were a freshman Kelvin Troy (who did little), Todd Milligan and Stan Nance. Nowhere near as talented as the current RU team.