While I agree with most of your comment, I don’t think the application of emergency necessarily contradicts fundamental rights.
For example, a truck may be allowed to park on a road for a while. They are allowed to honk occasionally as needed while driving. This is completely legal. However, that doesn’t mean they have a fundamental right to park private objects in public space and disturb the peace by honking unnecessarily for extended periods of time.
Laws allow people to do a lot more than just what fundamental rights allow. Often those laws will never consider scenarios that are not fundamental rights but are possibly hurting the fundamental rights of others, and then for practical reasons, an emergency would be the only way to resolve the situation in a reasonable amount of time.
If the emergency was abused to suspend fundamental rights that can be opposed in courts and at the ballot box. Emergencies don’t give the government carte blanche to abuse citizens’ rights. They give government a reprieve to act quickly, and let the legal system get involved later.
In most jurisdictions (I don’t know if this is true in Canada, but it’s certainly true in the US, where courts required governments to overturn emergency laws during the pandemic), people can still petition the courts that their rights were suspended illegally.
Emergency laws don’t eliminate rights. They suspend them and courts absolutely have the ability (at least in the US) to get involved and penalize the government if it finds the suspension of rights are unwarranted.
I don’t believe any Canadian court has found that to be the case in the truckers blockade, which probably reflects that fundamental rights were not suppressed.