garyt1957 Probably because even though the face is open they're still built with some internal draw bias.
This is true with all OEM products now. They must think everyone is a slicer, which used to be the main problem years ago; not so much now, from what I see on courses. it has turned into a 'hookfest' out there, probably caused by those damned 'OEM spec' shafts, too weak in all flexes. I use Sr. flex, with extended length drivers, and do have to be careful of hooks. I could(probably should) play the R, but these feel too good to give up. And, they make me control my swing, esp. when I have the want to play Hulk on the tee. Mind control shafts, I'd say.
If you watch Justin Rose, you'll see it is all in the swing. He's as wild as any of them, even to the left, and his driver is(supposedly) 6* open with XS shaft.