For people not so used to wedging, the only real way to build experience is by doing. Butch, I gather you are a get-it-on-the-ground-and-go treeman working for tree service, who May not want to pay to see you spend extra time on a particular tree.
If people can set a line to help tip the tree, if the wedges don't do it easily enough, its the best way to learn (in non-critical situations). Sometimes, wedges can be 10x's (arbitrary number) faster than setting a line (where one should still be backing up with wedges), and you never have to try to get wedges from under the tree, like a rope. Ropes are expensive if cut, and can get crushed between the spar/ tree, and bunk logs or rocks, etc.
You've got your residential niche, Butch, where setting a line is frequently best, and pretty much in place if the rigging-line turns pull-line, and you tons of experience. Not positing a one-vs. other point here, just more tools. I recall BrendonV being a pull line guy, and having a similar discussion a while back. Don't know if he started wedging more. Adding other niche's tool and techniques to our own simply adds more tools. You'd never see loggers pulling most trees, and they get wood on the ground.
Pounding trees over helps a person to feel how their hinge is working at different thicknesses. My late friend would never wedge over trees, and was in fact scared to wedge versus pull-rope, on easy trees. He wanted to leave thick hinges on spars, even, 'just to be sure', which to me was being sure that he was overloading his ropes, and increasing the risk of barber-chairing.
One benefit of the pull line with a vehicle is speed to help it have momentum to the lay. Each situation is its own.
... all of the above ... 
