Even just turning a PDF form into a properly-configured, digitally fillable and signable form is a massive usability increase, and of the forms I fill, I rarely encounter one with all fields properly editable from the outset. We're in a strange halfway place where everything is digital, printing is obsolete, everyone has asymmetric cryptography and biometrics in their pockets, but we're emailed forms that we must print, wet-sign, scan and email back (unless we're tech-savvy enough to edit PDF forms and the recipient is tech-savvy enough to accept digital signatures).

I ended up reworking the entirety of my many-paged lease agreement at my last apartment so that I and my roommates could more easily fill it out and revise mistakes. I recently had to fill out a new patient questionnaire, and while someone had clearly tried to digitize the form, it was rife with issues that made the inputs unusable that I had to fix (such as radio buttons being mis-grouped).

Making a functional PDF form is not only nice for those filling them out, but also allows for easier automation when ingesting the forms. I wish that those whose entire jobs revolve around the processing of forms would put in a modicum of effort when creating them. Maybe I'm underestimating the difficulty of these things for the layman who hasn't touched digital UI stuff.