You get it. Many do not. They are thinking of the Red Army and 100 divisions at the Fulda Gap. Putin’s army is a small fraction of that. If the 199K number is correct then there are maybe 70K left in the entire ground force.
Putin has more than that, much more if he calls up the reserves. Technically he can mobilize a couple of million.
But a) does he want to call up the reserves, which cannot be popular, and b) does he want to commit so many more to this operation, and strip Russia’s long borders?