There's something really insidious going on with Russian conscription/recruiting in this war. It probably deserves someone more insightful to do an analysis, but here's my take.
Putin and/or the higher ups in the Russian MoD are using the war as a meatgrinder for minorities (cultural, ethnic, religious and social), as well as a way to get rid of political enemies and 'undesirables' - which are defined as any individual belonging to a group or organisation that is determined to be harmful to Russian security & defense, or constitutional and social order.
In doing so, Russia is emptying its prisons. The US and the Ukrainians estimated in early December that at least 40,000 Russian prisoners have been sent to the front lines as active combat troops. That's about 10% of Russia's prison population. Estimates by NGOs range from 30,000 to more than 70,000.
That includes political dissidents serving jail time. More than 15,000 anti-war protestors have been arrested, detained or sentenced in the last 12 months. They are now being conscripted to fight in the very war they were opposing.
The net effect is that while Putin is weakening Russia overall with this war, he's strengthening his overall political safety by eliminating opposition to his rule within Russia. And, he's also eliminating the most likely core of future political discontent that a weakened Russia will produce, while minimising casualties in the areas where support is most important.