Liposuction is a good choice because it builds confidence. It helps you look like you want to look quickly. It also can help in diet because once you look the way you want to look it may encourage you to keep it that way. You may feel more inclined to diet and work out to keep it.
My personal preference is that one should work on changing their attitude and outlook on life in order to feel more acceptance of who they are. However, I am a realist. Not all people are that big on self improvement, and some are incapable of the type of reflection needed in order to achieve such improvement. If someone truly thinks that their problems can be solved by having a doctor attach a vacuum cleaner to their thighs and sucking out the fat, then go for it.