It is not, Russia for the most part is a landlocked country without unimpeded access to the high seas through warm water ports.

Russia stands to gain quite a bit from the Arctic routes opening up and Vladivostok becoming a warm water port open all year round, as well as from large swaths of their frozen tundra becoming ripe for exploitation.

Warm winter = less gas usage for heating = less money for Russia’s war. Putin won’t be in power by the time the Arctic opens up.

also more favorable weather for pickle jar babushkas to be outside, on balcony. So more protection from drones and cruise missiles.