As someone who has never worked in an enterprise SaaS will never fully understand the hype or secret sauce around building and selling eSignature software.
Not like that was different from simply pressing a button and acknowledging some message. No cryptography, no standards about legally binding e-signaturees, nothing. They just wanted the scribble of the inspector attached to the form.
Signatures are basically a way of signaling approval, ackowledging something or declaring intent. I designed that feature and always thought about it more as a intentional friction to make someone think briefly before closing or approving an inspection.