So, tanks are the strategy of Putin, but at the same time they are not the strategy of Putin and they are not needed, right?. I see.
Tanks are needed, just a couple of thousand of them are enough, there is no need for tens of thousands of tanks for the success of the operation in Ukraine.
So, Russia has air superiority, yet almost no planes are being used. And while some areas are attacked by cruise missiles, many are also stopped. This is certainly not my concept of air superiority, which anyway is not that useful for urban warfare, but just to humour your point.
As far as I can see, reconnaissance drones are actively used on the Russian side. Airplanes and helicopters are also used, but not as actively. The drone finds the target, followed by a missile attack. Why reinvent the wheel when simple things work. In urban conditions, this tactic works worse, I agree. This is probably why Russian soldiers do not particularly climb into the cities, with the exception of Mariupol - control over which is of great strategic importance.
While the US cannot send troops over the terrain, they are certainly feeding a sh*tload of info to the Ukrainian Army, basically the best military network of satellites and radars at their full disposal along with all the information that seems to be leaking from every rank of Putin's military. Seriously, I just cannot believe how accurate the information that is being passed by the US is, I am starting to think that Putin is a double agent. Fighting blind... you must be joking.
Well, in this case, we must admit that operational tactical information support from US satellites does not help the Ukrainian army much.
On the soldiers... well, someone has to worry about them you know, and it does it seems that you and Putin could not care less about them. Nor their families.
There are risks in every profession, and for the professional military, these are the risks of being killed, captured or injured in the course of doing their job. Their relatives will receive compensation and survivor's pensions, and they themselves will be declared heroes who suffered in the fight against Nazism.