Ah yes, since controversy over how judges decide only exists in the US.
In any case, you're confusing cause and effect.
The US system of having legislators approve/reject nominated judges is not the norm elsewhere. The only restrictions on choices for the Canadian Supreme Court are a) being a member of the bar for 10 years, and b) having three judges being from Quebec; otherwise, whoever the PM chooses becomes one of the nine sitting judges on the court. End of story.
If the Canadian Parliament had to give an up/down vote for a nominee, there would absolutely be far more attention paid to each nominee's opinions and qualifications ... and far more attention paid to that nominee's subsequent decisions.