Set Global Form Defaults (Fonts, Sizes, Weights, etc.) Independant of SharePoint Settings
Often we need forms to use different fonts, sizes and weights other then what the SharePoint site the form sits on uses. When we do, we have to change every control to adhere to the design changes that we want to get the form to look the way we want. If we had the ability to tell the form to stop inheriting these settings from the SharePoint site and to use these settings instead, then it would save a whole bunch of design time effort.