"but we're running an experiment in Europe to find out what happens when horrible regimes stop providing oil"
That experiment is basically switching one horrible regime with another (e.g. Aserbaidschan and Qatar), so I would argue that it was never really about morals at all, but rather geopolitics and power all along.
Continue doing more buisness with russia would simply be more expensive, as it would increase the cost of doing buisness with closer trading partners/allies.
"morals don't cope with the scale that humans need to operate on now."
So when was a time, when morals could and should have an influence on human operations? Slavery just ended recently (in most parts of the world) and your argument means for example continuing buisness with Nazi germany during the war (and holocaust). There is no line, when you say morals are not the right tool. So this means profiting of slave labour camps. The more and brutal exploitation, the more profit, the better?
I don't think so.
My stance is, that there is just no general solution and everything is case by case. By doing buisness with a random chinese company(e.g. buying something made in china), I do not endorse chinese politic. But if that specific company is involved with slave labour, then yes, I would support that slave system by buying from them and I would try to find a alternative.