No those number COMBINED 3 point % and 3 pointers made tell a more complete picture. Just like when looking at status you have to COMBINE what they tell you for a more complete picture. Most stats sites do not rely on Turnover/Ration alone. Not one of the stat sites puts that value above the rest. Hell even Hollinger doesn't put much stock in any single stats including his own custom ratios. Show me a site that says that's a be all end all stat.Assist to turnover takes all those stats we've been talking about and lumps them into one convenient number. Kinda like how 3 point percentage is a better measure of shooting than just three pointers made.
"it's not a perfect measure of playmaking due to factors like ball-handling turnovers and varying assist quality, and should be used with caution"