I agree with you on the physical effects of cannabis on dogs, I really do not believe it will kill them.
Do you think they enjoy the effects though and is it fair to dose animal that has no choice? I have seen a few dogs eat cannabis and get the shakes or start walking in a zig zag and they do not look like they are enjoying it. They have that look in their eyes like what have you done to me.
I definitely do not think dogs like being high, if your dog is shaking then you have given it to much. Earlier when I mentioned shaking I was giving an example of how to know when you are giving too high of a dose.
But a lower, comfortable dose should stimulate appetite, kill pain, encourage restful sleep, and potentially inhibit the growth of cancer cells(CBD has been proven to do this is a lab setting, but there is no proof oral doses do).