Yeah it's a shame. Android allows for a lot of cool apps that have access to control or record other apps. I assume FLAG_SECURE was added for banking apps and the like (it's on for my banking apps), so it's a great addition.
If Android really cared about its users, all it would have to do is permit user-prompted screenshots and screen recordings but still block other app access. I can't think of a time where I'd want my own phone preventing me from screenshotting, but I can see the use case for general screen access prevention.
I don't personally know a root-obly way to disable this, but xposed has the disable_flag_secure module that I'm weary of using because it removes the flag everywhere.
If Android really cared about its users, all it would have to do is permit user-prompted screenshots and screen recordings but still block other app access. I can't think of a time where I'd want my own phone preventing me from screenshotting, but I can see the use case for general screen access prevention.
I don't personally know a root-obly way to disable this, but xposed has the disable_flag_secure module that I'm weary of using because it removes the flag everywhere.