JWT is a very useful technology, one that increases UX by decreasing overall latency.
Any technology, can be "abused" or used by people that do not understand how it works, and as a result you will have an insecure system.
JWT is a standard for using that technology, and one that makes several design decisions which make it fragile.
This is the difference between, say, the idea of a car (and the benefits thereof) and a Ford Pinto.
JWT is a very useful technology, one that increases UX by decreasing overall latency.
Any technology, can be "abused" or used by people that do not understand how it works, and as a result you will have an insecure system.