"Business Rule" to determine if field is Null or Blank

I am trying to write a Business Rule to hide fields if the main field contains no data to clean up a busy form.

I have tried to create a business rule checking if the field is "Blank" or "Null" and if either is true then the corresponding fields are hidden.

When I run my form neither is doing anything and all of the empty fields and their correlating fields are displayed.

Am I using the wrong term to look for an empty field or are business rules really not functioning in Power Pages?

I am validating each Business Rule and it says successful, then I am saving each and activating each as well. When I look at the fields in the form I can see the Business rules there that correlate to each field in the form.