I definitely agree. Even Elo says that Carlos is already better than Hewitt ever was. Carlos was at 2290 to begin the tournament, Hewitt peaked at 2295, and Carlos is probably now somewhere in the 2300-2330 range.
Hewitt was a really good player, and the fact that he was cast adrift by the rise of Roger sort of diminishes how good he actually was from 2000 to 2005. But...he was also the beneficiary of the kind of opportunity you talk about. His reign in 2001-02 was against a decrepit Sampras and old Agassi, a weak generation that should have been reigning (Kuerten, Moya, Rios, etc), an erratic then-best peer (Safin), and before the rise of Fedal. If the Kuerten group had been stronger and/or Safin been less of a head-case, there's no way he'd have gotten 80 weeks at #1.
The "anti-Hewitt" would be Andy Murray, whose mere 3 Slams under-represent how good he actually was.