Well, have you tried to actually read some of those early documents? I learned cursive in the 50s. But I do genealogy and I can’t read most of those early documents. Just saying. I think it should continue to be taught but I actually don’t use it much anymore. My penmanship skills were never very good and like my calculating skills have deteriorated since technology gave me other ways to do it.
For several years (recently) I did some substitute teaching in a good Catholic school. Every class when I would write instructions on the board in cursive, there would be several students who would say that they couldn’t read it. I’m sure it had nothing to do with my writing. ;-)
I have finally gotten the hang of gothic German type but continue to be stumped by the handwriting on original German documents.
You don’t have to sign for anything?
I am also a genealogist. Reading cursive is a great advantage if you are a researcher in any historical documents.
Reading old German documents is another matter. The older Gothic script is nearly unreadable to modern Germans. I can make out some of it but only because I had a serious need to translate the documents.
Still cursive is important in the same way as learning another language skill. It expands your knowledge and analytic skills.