Russian nationals are aware of the significance of a high casualty loss, in terms of the implications it has on preparedness at the frontline. While their way of fighting is not going to be fully understood, it’s believed to consist of a sort of human resourcing that pays particular attention to people and their skillsets.
Putin tends to keep things in perspective, and so in this regard he may have limited such ‘resources’ only to necessary people. It’s to maximise the availability of the war-ready, or, to minimise a reliance on a small number of the highly expert or technically skilled.
Russians are taught to be aware of trouble with their senses, too, and a President is known to be time-limited in this respect. The feeling may be to give up on some targets, show Ukraine raw might, and look for wins in other ways. This change of position could lead to Russia’s favourable end to its own war.