Not really what I'm saying. The Ukrainians can exact a steep price for a bit of land lost, and even, if necessary, counterattack and retake it. The Wehrmacht were infamous for counterattacking lost positions.
When an American assault succeeded in taking a position, extreme confusion reined. One guy has 200 rounds left, the next one has 10. Need to cross-level ammo. Holding that position relies on interlocking fields of fire ("Smith, you shoot everyone between the barn and that oak tree. Jones, you shoot everyone from the oak tree to that willow next to the creek.") But you have not been on the objective before (after all, you just seized it from the Jerries), so until the squad leader comes over and points out everybody's sector, nobody knows for sure who is responsible for enemy troops between the barn and the oak tree. Smith may think Jones will take the latter sector, but, unbeknownst to Smith, Jones if dead 50 meters back, so no one is taking the sector from the oak tree to that willow next to the creek. Wounded have to be evacuated and somebody has to carry the non-ambulatory wounded, Etc. Etc. You have to experience it once to understand the degree of confusion. That is when the Krauts counterattack.
Ukrainians appear to be doing something similar.