https://x.com/patio11/status/1930340924212539902 (n.b. This is extremely well-known among companies which have a business process where you sign things. Most of them use a signature to demonstrate solemnization rather than authorization or authentication.)
I'm not familiar with the word solemnization here. But the concept makes sense. The purpose of the signature isn't to demonstrate consent, or identity. It is to create a ritual.