It just so happens that under Russian rule, Russian rulers will be making profit instead of Ukrainian rulers.

I think we're missing a couple of nuances here, no? Although it's a stretch to call them nuance. The way Ukrainian rulers have been making money has been through privatization. And because there's so much privatization we need to look at who owns Ukraine's economy. It's only escalated since Russia invaded, with national assets being sold off to foreign private sectors so cheaply that one has to wonder why they did it when the gains are a drop in the bucket compared to the direct aid they've been getting from Western public sectors.

If Ukraine emerges from this conflict with its own sovereignty, it'll be sovereignty over a flag, a presidential palace and a state framework that protects foreign companies' investments from hungry Ukrainians.