This strategic reality will prompt the new Russian leadership, of whatever composition and persuasion, to initiate a de-escalation of tensions in its Nordic-Baltic neighborhood in order to avoid a disabling arms race. This prospect might appear far detached from the present-day discourse on the existential confrontation between the Russian “state civilization” and the decadent, disunited and at the same time invariably hostile West. It is useful to reflect, nevertheless, that the military reforms implemented in Russia as recently as 2008-2012 were underpinned by the strategic assumption that a protracted conventional war in Europe was not an option. Russia cannot afford to proceed with militarized confrontation with the re-energized Atlantic Alliance, and its ability to recover from potential defeat in the war of Putin’s choice depends directly on returning to cooperative formats—and first of all in the Baltic region, which will then no longer be perceived as a strategic theater.
https://www.ifri.org/sites/default/files/atoms/files/ifri_baev_russia_challenges_baltic_2023.pdf
Why would Russia want to avoid a "disabling" arms race with the West? I was reading this and I was wondering why Russia would even want to participate in an arms race with the West and why it would even want to prevent the West from building up superior weapon systems. I was thinking any arms buildup is insignificant since Russia can use nuclear weapons at any time it may get invaded, so it doesn't have to match Western military spending nor have to prevent a military buildup from the West. Is there anything I am misunderstanding?