The problem with blindly saying all screen time is bad is that it actually prevents us talking about what is good and what is bad about it, and therefore actually impedes progress. As a result, we have almost no guidance to either parents or app developers about what constitutes "good" content, which actually results in more "bad" content and more kids being exposed to "bad" content because parents are just operating in a complete blind spot where they let their kids have small amounts of "screen time" during which they can do anything.
It's like saying "I limit my children's tobacco time to 1 hour per day" - which is ludicrous but that is exactly what being promoted currently as "good practise" for parents to follow.