I completely agree. It is entirely possible to secure with the appropriate API's. Operations can be rejected by the server. If done correctly the client side

I completely agree. It is entirely possible to secure with the appropriate API's. Operations can be rejected by the server. If done correctly the client side can have an optimistic UI that is also secure. (Optimistic UI's don't need to wait for an ack from the server. They display local changes immediately and roll back if server denies.)