If the argument is to enable backports and let it update, what’s your use case for stable vs using testing? The whole point of stable vs testing is that versio

If the argument is to enable backports and let it update, what’s your use case for stable vs using testing? The whole point of stable vs testing is that versions are fixed, reviewed security updates make it, it’s all tested and vetted. On the other hand, testing and backports haven’t been tested as well and could have issues. If we use stable and incorporate backports from testing, is it still stable?