Russia doesn’t have the same stockpiles of Precision Guided Munitions, they don’t have the same infantry level access to NVGs, they have some high speed high tech gear, but limited amounts compared to Americans.
Stockpiles of munitions are vital, you can’t simply expend infinite numbers, they take time to resupply. At times even American troops were supply constrained on certain missiles.
The point is, Russia has to be selective, especially since Ukrainian AD is still active.
