And then there’s the reality that Kursk has only played into the Russian’s hands in many different ways, including, that it split already inferior forces in an attrition war and on the geopolitical level where it caused Chinese caution and reluctance about the whole Russian operation to essentially immediately fall away due to the insanity and recklessness if the Kursk operation, which only has gotten more solidified due to the atrocities against civilians committed by the Ukrainians.
You appear to see things in a very narrow scope that is predominated by propagandistic perspectives. If land invasion were some kind of cause for launching nukes, then the wholesale invasion and infiltration by Mexico and its cartels that have killed around 1M Americans would have been cause to, e.g., nuke southern California, Arizona, New Mexico, and Texas.
Do you want nuclear exchanges? Would you have preferred for Russia to have nuked its own territory instead of just using it to their advantage to draw in immense resources in a Ukrainian self created kettle?
The fundamental misunderstanding of all the Ukie cheer leaders is that they think this is one type of war, when it’s actually a whole different type of war where Russia is intentionally going it slow. “Russia Is losing their shock and awe, blitz war” they tell you, not knowing Russia is fighting more of a millstone war, grinding up all the Ukrainian men Downing Street and Biden fed into it.
This is simply not a scenario where something as reckless as using nuclear weapons is yet warranted even though the West and people like you keep trying to edge us closer to it in the belief that you can just feet away with these kinds of provocations forever … until humanity finds out that there was a line … and life on earth ends because of recklessness of narcissistic psychopaths with god-complexes.