replacing all shower fixtures

Hi, I want to replace all of the faucets and shower diverter in my old bathroom. Lowe's sells a Danco 3-Handle Metal Tub/Shower Repair Kit For Price Pfister. It seems to have everything to replace from the bronze 1/2" fittings outward including:

- H/C handles pair,
- diverter handle,
- 12H-2H Stem,
- 12H-2C Stem,
- 12H-18D Stem,
- (3) #38 seats,
- (3) flange and nipples

My question is How is this a "repair kit"? It seems to contain everything you need to totally replace all the faucet hardware from the pipes outward. Am I missing something?

If something breaks you replace it from the repair kit... I would hope that a repair kit has everything that I need to repair something

So does that kit contains all the parts that I need to replace all of the bathroom hardware that I have?