I lift 99% of vehicles I work on from the pinch welds. Many vehicles have reinforced lift points on the pinch welds or even an arrow designating the lift point.
The only time this is not applicable is with trucks, especially large trucks, with an actual frame. Or with some vehicles that have some other form of lift point. Most modern vehicles are unibody and don't have frames, even if they look like they do, so you run the risk of damaging something.
Note that I use 2 post lifts with 2 lift arms on each side. Aside from the 4 post racks, every shop I have worked in had this setup. But the same concept should apply when using a floor jack. If you are jacking a truck, put the jack under the rear differential and jack stands under the axle. If lifting from the front there should be a cross member you can lift from and put jack stands under that cross member or each control arm.
Jeep Liberty, Patriot and Commanders are all ok to lift from the pinch welds. We had 3 or 4 Jeep's in the shop the other day, none of them were Wranglers.