Your likelyhood of finding a stud exactly where you want it is pretty low. I buy nice planks of wood, 4” wide, and nail that horizontally along the wall (into the studs). Then I attach my wall hangers to those. Looks pretty nice with minimal effort.
Also, it's not the hanger that'll give way, it's the drywall or the anchor. The drywall anchors that come with the hangers are pretty much trash. They look like the good screw-in style, but the plastic they've used is brittle. Spend a few dollars and get better drywall anchors.
if you're going into drywall only, it's OK, but you need to use fasteners that will hold - not drywall screws. Those butterfly things that flip out behind the drywall will work.
They do protect nicely from slipping out of the hanger though with gravity activated "hands" that flip up to keep the guitar from sliding out. And if you like they have a "lock" - thats not really a real lock, but keeps random hands from pulling your guitar off the way unless you want them to.