It only happens when you accept changes in PI, you can set up a whole industrial setup in PI and cancel it at the last moment without losing any $$.
Install program also requires to accept changes in PI, thus you’re not wasting any rescources yet, beside a lot of extra clicking all is fine.
For example what requires to accept changes in PI first is planning your extractor.
You can’t put a extractor and place the pins at the same time, you first have to pay the 40k to set it up and what more, and than you can work with the pins in planning mode, getting the before [install program] and after [install program] results