because this case lacks of a solid legal base.
First, the extradition treaty between the USA and Canada cannot be applied to a non-American or non-Canadian citizen. Obviously, Ms Meng is neighther a US nor Canadian citizen.
Second, Ms Meng did not commit any crime in Canada or within the USA as a natural people herself by any criterion. There is not reason to have her arrested at the first at request from the US authority. Her human right has been violated ever since.
Third, given Huawei or its subsideries preached some so-called action or sanction initiated by the US against Iran, the US authority should punish Huawei but it is not fair to punish its executive, i.e. Meng Wanzhou. However, both China and Canada did not join the US sanction against Iran though. More seriously, if Meng is extradited to the US, this event will trigger a new cold war between the US and China, the two largest economies in the world, that shall negatively impact the world economy.
Fourth, this case may be used as a political chip as indicated by the US President Trump for the trade negotiation with China. This alone shall lead to the Canadian court releasing Ms Meng via a prolonged extradition hearing.
Finally, justice would eventually conquer evil. All people are watching this case.