In the future, I strongly see Ukraine becoming another Israel. A population of rabidly nazi, captured proles just like in Israel (how popular the genocide there is, for example) and the people that would “volunteer” are likely going to be conscripted entirely in the future, leading to goals of being more restricted moot in the first place. The Ukrainians who have sympathized largely have already fled to Donbass/Luhansk or broke away like Crimea.

Clarified in another comment too, I would think most sympathetic Ukrainians have already fled, either out of the country or to Luhansk/Donbass. The ones who remain are going to be conscripted and forced to fight; meaning if they can surrender, Russia has been receiving those just fine regardless. A future Israel where generations are brought in mercenary-style or raised in population collapse to fight on the front. All this means; what is the point of holding back? Optics?