The "chat control" law is a big step for EU
A big step, towards an Orwellian totalitarian ideology
Essentially forbidding the use of end-to-end encrypted communication will have many consequences
It won't do much to fight crime, since criminals will use secure communication channels regardless of what the law requires
It will, however, make it much easier for OTHER nation states as well as cyber crime groups, to do mass surveillance against regular and law abiding citizens of your nation, including people in a position of power in politics as well as business
It's ludicrously naive to believe that such powerful capabilities for mass surveillance will not be targeted and successfully compromised by your adversaries
It is similarly naive to believe that such mass surveillance capabilities will never be abused "internally" by political leaders, business leaders as well as just random IT staff in the various tech companies that are responsible for implementing and managing the access to this capability
Protecting against the "bad guys", as well as national security threats, is important. Leveraging offensive technology in order to do so in a targeted manner (and at a cost, automatically contributing to limiting the use to cases that matter) is sometimes necessary
Introducing capabilities for mass surveillance at scale is a completely different story, however. Saying that this is not the "intended" use of the capability in question means nothing