No.
The very early UFCs were largely a carnival attraction and took some time to catch up to or otherwise attract the talent that was already operating elsewhere.
If Royce had started in Pancrase, where many of the fighters knew how to grapple and understood submissions, he would *never* have gone 12-0.
Shamrock and Severn were very legit wins for Royce. He never would have won a rematch against Severn, however. Everyone else in the UFC at the time largely had *zero* idea how to grapple.
While the UFC was still finding its feet, Royce got in just ahead of legitimate wrestlers who would have put him on his back and smashed his face in. Coleman, Frye, a rematch with Severn. A pre-drug-crashed Mark Kerr. Jesus Christ…
Frank Shamrock.
Sambo practitioners like Oleg Takterov would have been a problem for him. Igor Vovchanchyn probably would have killed him.
A post grapple-trained Bas Rutten may have done the same.
*Nearly* all of them in operation elsewhere during Royce’s time.
Rickson is a different conversation.
Royce was a significant figure. He was the best fighter in the UFC during his run. Hardly the best fighter in the world at that time however. And I would expect that is hardly a controversial opinion.