You obviously just jumped in this conversation without doing any reasearch. The good kits out today don’t use the shock tower to support the car. That was nagnumforce junk that did that.
I do agree that the kits have evolved significantly. I still feel that the majority do it for the internet checklist factor. I don't see so many that people are actually driving to a level where it matters if they differ from stock.
I guess I look at it from a performance perspective. If I want the feel of a new car, the showroom is right down the street. If I want an old car that performs well..... then that's going to influence what I do.