Yes, the “healthy substitution” is a great idea and yes, of course I ate meals instead of the pizzas I was eating less and less frequently.
The two things to remember are:
1. making a healthy substitution may well not eliminate your desire for the more addictive (sugary) meal or snack, and don’t expect that it should or would. So, still a good idea to “Work Through” your desire for the sugar.
2. doing healthy substitutions will only take you so far, so aim not to rely on that too much as one outcome will be overeating healthy food, as many do!