Not even close. Even with a relatively stringent requirement of 500 FGA, there have been 165 seasons at a FTr of .600 or better. Dwight Howard was over .750 nine different times. The all-time top FTr (min 500 FGAs) was put up by DeAndre Jordan, with a pretty silly 1.219.
Now, true, Jordan/Howard were getting hack-a-shaqed, but nobody was intentionally fouling Cedric Maxwell ('78-'79: FTr .886, FT% .802) or Corey Maggette ('06-'07: FTr .783, FT% .820), and plenty of those 165 seasons were earned "honestly". Even our own Kevin Martin had a season of .650 FTr.