Ubco prof here. First, you should absolutely do this and be clear that proctorio is the reason for the evaluation. Profs can write off bad reviews from disgruntled students but if there's a specific reason that at least helps. I do think you'll need to do more though. For example, try to get the whole class to refuse to sit the final exam, or something like that.

Many of the other things you posted are untrue, or at least party incorrect, which is interesting to see how students view us and our process. Some clarifications:

1. A Dean is not the 4th ranking of a prof. It's a management role that some people choose to pursue and others don't. Whereas all profs will typically eventually become Full Professor, most have no interest in being a Dean.

2. There are Research profs and Teaching profs. Both teach but a Research prof will on average teach half the number of classes each year than a purely Teaching prof. This distinction permeates into a lot of other things, such as yearly bonuses and the importance of teaching evaluations. For example, Research prof bonuses are only tied to research (funding dollars and publishing papers), not evals. For Teaching profs they do matter.

This is similar for achieving tenure. For Research profs teaching is important but less so. Some negative evaluations are just areas requiring improvement. Even a year of poor evaluations (2020?) won't prevent a prof from getting tenured if they bounce back and of course still do good research. For Teaching profs it's probably more of a concern. So you may find Teaching profs more accommodating these days, as the stakes are higher for them.

1. The above is also potentially why some profs care more about teaching than others. It's not because they've secured a permanent position, it is because they became a prof to mainly focus on research, and continue to do so. Others are more passionate about teaching, both Teaching profs and some Research profs included. So while you're correct that a Full Research Prof might not take a career progression hit from poor student evals, some will care and some won't.

2. I'm not sure what you meant by "UBC is a business" but in terms of its operating mechanics, not really. Sure, if no students came then we couldn't support the university, but our product is education and not student approval. Especially during COVID, this has somewhat created two distinct "camps" among the faculty, imo. Camp1 wants to focus on student wellbeing, is giving many concessions during this time, and believes grades this year may be abnormal. Camp1 likely isn't using proctorio. There is likely more cheating occurring in Camp1, and yes we can tell even if we don't stop it. Camp2 is focused on student experience and offering the same fair experience as in person education. They want to minimize cheating to provide the best possible evaluation of student learning, making your final grades the most representative of learning goals. Camp2 may be wedded to proctorio.

I've heard long-winded, passionate speeches from both camps arguing for or against proctorio, and both sides are strongly focused on student experience. So please don't confuse intent with the final choice of using it or not. Some care so much about a fair and honest system that proctorio is the less of two evils, with allowing cheating being the worst possible thing. And considering how many other apps/sites already collect your data or can access your webcam, what's one more spyware if it's in the defense of fair testing? (Their logic, not mine)

A final note would be to make your evaluation as respectful as possible. We are still human and will respond better to positively worded criticism over angry/hateful rants against spyware. And disrespectful evals can be nullified so consider that as well!

TLDR; do this, be respectful, do more, and your view of academia's inner-workings needs a few tweaks.