I don't think anyone in the world seriously believes that the Meng case is completely free of any politics.
When Canada claimed that it was purely an issue of law and order, they were quickly slapped down by Donald Trump.
And personally I find it hard to believe that it was a coincidence that Meng was arrested on the very same day that Trump was negotiating a trade truce with China, and immediately after the US has been forcing their allies to stay away from Huawei.
The entire case is soaked with politics from top to bottom. Judicial independence is a great buzzword just like America claiming to protect freedom and democracy across the world, but tell that to Cohen and Manafort, the latter of which will get off with a pardon. Justice for them, depends on how much they are favoured by Donald Trump, or what he ate for breakfast that day. The entire system is a joke, just go to the poor urban areas and ask any young black man there how much they trust in the American justice system.
In fact the unilateral American reversal of the Iran sanctions (which violates international law, i.e. UNSC resolution 2231) and their abuse of the Canadian extradition treaty (not in good faith), are both perfect examples of the primacy of politics over the rule of law.
In realpolitik we know this is the case, however many in the US and Canada seem to be confused by their own soundbites about freedom and democracy bombs. What we are seeing now is clearly that the law is being wielded as a blunt political hammer. Their rule of law is tissue paper in the hands of politicians.