It is possible to add "all watchers" in the notification scheme for Issue Created. However, it is only possible to add watchers to an issue after the issue is created, so the watchers will not receive an email notification about the creation of an issue.
We can't configure that setting because we can add watchers only after reporting an issue.
We can configure that setting.
There is no workaround now. Keeping in mind this setting is never triggered.