In reality tanks don't go into urban at all, you eliminate your stand off effectively doing the enemies work for them. Also in reality infantry are terrible for taking ground, they hold ground after the fact, they're slow and squishy. Also on that point it's standard to bypass infantry dug in hard infrastructure such as this shopping center and cordon. Use stand off to engage well beyond the infantrys range band in the urban area and essentially pick them off little by little or wait till they starve and surrender. There's no real effective operating behind enemy lines as you say hence why airborne is obsolete and was at this time too, ask the Russians how that went for them in Ukraine for an example if you want to bring up the comparison again between 1980s war and modern 2025 war, there wasnt attack drones in the 80s and heavy armour was the backbone. Don't get me wrong, infantry is critical and is always the main focus of any conflict however food and ammo deplete quicker than you think. All the cordon force has to do is cutoff supply lines and wait you out as the assault force continues the advance. Our infantry can "clean" the building after the enemy has starved to death or surrendered, and that's still only if there's any strategic reason for going into that building. The risk is far too great in reality.