My device should serve me, not the EU. If I choose to violate EU emergency alert laws, that's on me.
Of course, you can liberate yourself quite a bit from the draconian rule of the manufacturer by rooting the device, but then you're also able to disable cell broadcasts permanently...
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.