If "notorious," which has nothing negative in its roots, nonetheless has come to mean "infamous," what is "notoriety"? One dictionary's definition — "the quality of being notorious" — seems unassailable. So when the writer said it was "not in Thomas's personality to court notoriety," the passage was open to misunderstanding. (Other things made it clear that the writer was paying a compliment.) As a synonym for simple fame, "notoriety" has gained ground. But it's still better used to mean a bad reputation — ill fame. Less room for misunderstanding.
I think you meant fame, renown or distinction, which is certainly true.