This a million times. Tanks are ceremonial items at this point, at least against a sophisticated NATO-like enemy. This is just a propagandist display, something Russians are prone to do. Russia doesn't even have the autonomy to properly invade a non-military power like Ukraine without the West stepping in, thus all the "that's not really us" shenanigans. I'm not sure what enemy they plan to use this stuff on as anyone within their limited military range can trivially get Western ATGM's or already has them.
The reality is that long-range power projection, automation/comm/logistics, long range targeting, advanced arms, drones/UAVs/unmanned, air superiority, quick carrier group deployments, etc decide modern war outcomes. Russia struggles with this level of sophistication, hell, they are trying to get the French to build carriers for them and are woefully behind in several critical key measures. Pretending its still WWII and bulking up in armor, especially ones without counters to modern ATGM's, makes as much sense as building another Maginot line. Russian reactive armor leaves a lot to be desired. ATGM tech usually outstrips armor tech quickly and NATO's current offerings are pretty impressive. Not to mention the cost of reactive armor raises the cost, per tank, anywhere between 300-500k, which makes it economically infeasible to retro-arm older tanks frequently.
Russia's tank force is mostly a 1970s relic, the T-72. Constant retrofitting is still lipstick on a pig and to NATO forces. Older DU based munitions like the M829A3's and others punch through these things with ease. Fifth generation M829E4's take out the best Russian armor today. A $10,000 NATO round punches through $500,000 tank armor. Tank armor is a fool's errand at best, as munitions catch up too fast and armor development takes too long/tank lifespan is too long/tank retrofitting is too expensive. The Russians know this, but lack the sophistication to modernize in other ways, so they double-down on tanks, which will probably have a long service life on the usual parade route, but not be effective in combat. Especially now that Putin has rebranded himself anti-NATO, anti-West, anti-Democracy, pro-Autocracy, pro-Annexation, pro-Assad, pro-Jong-Un, etc. He's not partnering up with NATO for some peace mission, he's pointing his guns at them and compared to NATO he's at a massive disadvantage militarily with these tanks, which just become very expensive coffins for Russian tank crews.