You have misunderstood. The chances of a TRV refusal are high not because she is applying from the US/not from Pakistan, but because she has no ties to demonstrate to the US (no employment, no study ties, etc) + with you as a Canadian PR, the visa officer will be inclined to believe that she will apply for spousal PR via the inland route (which is your intention).
To have chances of an approval, she must prove that you have compelling reasons to return to the US at the end of a short stay
Thanks for the clarification. Thing is my spouse is on 'H-4 spouse' visa in the US, which doesn't permit her to work or study, otherwise she definitely would have worked. We also don't have any property here in the US as I'm pretty young and early in my career. I could however show that she is mentioned on our rental lease agreement, if that helps.
Isn't the fact that I have an active job in the US, a good reason for us to come back ? I mean, getting a job in Canada is generally hard so won't the VO realize that I won't want to loose my job ?
Anyhow, is there anything else I can mention to make her TRV case stronger, even if the intention of visiting Canada was truly, just for visiting and coming back ?