WHO CARES! That’s like saying oh, that spider is only 9/10 legs. Eeeeeeeeeeeeeeeee!!!!!!!!!!
A 7 foot (of which 3.5 feet of it is really “shark”, the other half of it is tail) thesher is a rather small fish with a small mouth. Compare that to a 14 footer, of which now 7 foot WOULD be “shark” and it would have a considerably bigger mouth. Regardless, thresher sharks are shy and not aggressive, unless you are a smelt or herring. I don’t believe there have been more than one or two thresher shark attacks on man in the last 20 or more years.