When I’m at work I write (in cursive) in a logbook that is a legal document. Only the youngest engineers use block printing, which is what I was trained out of by halfway through grade 3. And their letter forms are often atrocious!
Because you don’t use it does not mean that it is unnecessary to all.
You also inadvertently made the point as to why learning cursive is important: If you can’t read or write it, how are you going to know what any and all documents written using cursive actually say?
Such an excellent point!