I think this is an interesting arguments. I would probably debate whether economic (marginal) damages constitute a strategic advantage, but in general I agree that it’s true. Injured people, manpower loss etc. is an overall damage. Maybe I would rephrase in that they don’t translate into immediate military gains, and there are of course negative sides as well (like the loss of image which I think is crucial for Ukraine in particular). I still feel that the benefits mentioned are not that valuable to violate the overall principles, especially because any violation is a step further towards abandoning those principles at all, which I don’t think is anyone interests (not that Russia is respecting any of those anyway, but this can have effects on other wars as well, potentially).