Bread-Bakers v006.n037.5

Ann Miner writes:

> [...]
>  For the sugar, you can substitute:
> honey  (1 T. sugar - 2 t. honey)
> molasses (1 T. sugar = 4 t. molasses)
> fructose (1 T. sugar = heaping 1-1/2 t. fructose)
> Sucanet (equal measure for sugar)
> [...]

What is the purpose of substituting these ingredients for sugar when the aim 
is to get the sugar from them?