From reading it, here's when I think the Training Bible becomes most useful:

1- you own a power meter
2- you belong to a bike club / have access to group rides
3- have raced / been racing for at least a year
4- have access to a gym with weight equipment during the winter / off season
5- have access to indoor bikes or own a trainer
6- are responsible for your own nutrition / have time to train

So yeah until you have done all of this, you can't extract all the book juice from it : D
I kind of wanted something less advanced when I bought it but now that I did I may be motivated to step it up a notch, who knows.