Once you go down that path it becomes harder to steer away from it.
What "path"? Making sure your main actors will appeal to the biggest demographic? How is that "a path"? They still have to be good actors, not just pretty. And they are!
The strategy did precisely what Paramount and CBS were hoping for last time: "Star Trek (2009)" caused a huge spike in sales of all Star Trek
boxed sets of DVDs.
You only need a few of those screaming teens to graduate to flully-fledged "Star Trek" supporter each movie and the franchise stays alive.