Because I use a template to make multiple copies of a personalized document/form. I constantly have to go into the PDF after each export to format fillable text boxes with the date format, currency format, etc. The same goes for the buttons. I have multiple save buttons as well as send form buttons that I have to "reprogram" each time I change the source InDesign file. It seems to be something that should be handled in the InDesign file. If you can choose Print why not Save?