Also, the people pushing for these measure (e.g., the U.K's equivalent of the NSA, GCHQ and most national-level police departments) understand these issues perfectly well.
Surely some of them understand the technical details. That doesn't necessarily mean they understand or respect the wider implications of a policy. This is why it's important to have a government that sets policy - taking into account all of the competing influences and potential consequences - and politically neutral technicians who then implement government policy.
No-one would dispute that if the government could examine every communication everyone ever sends then it could catch more very bad people and prevent more harm to innocent people. The problem is all the other stuff that also happens if you give a government that kind of power over its own people.
If by "hack" you mean she guessed the password, then yes.
Every time ukgov tries to make some sort of tech policy, it's embarassingly wrong, or naive, or both.
This comes from a country that effectively gave away ARM.
https://studee.com/media/mps-and-their-degrees-media
The most popular subjects for MPs who won seats in the Dec 2019 election