For other use cases, I'd probably agree with you. But you being startled and confused during an emergency because you didn't see the instructions on time can be very dangerous for everyone around you. It's not just on you.
If you suffer from panic attacks, for example, and these alerts trigger them, they do not help you, no matter how well intended.
If you suffer from (C)PTSD, and these alerts trigger flooding, they actually make everything worse.
If this were to happen while you are driving, you might even cause an accident.
The world is sadly too complex for simple solutions that assume something to be always good or helpful.
Which is why I believe it's important for the user to eventually control his device.