That’s one of the most troubling aspects to this war. Even when Ukraine pushes Russian troops out of cities, the reclaimed territory is still not safe. The shelling and rockets actually intensify.
It so different from a traditional war where you push forward and the rear area is pretty safe. Like D-Day. Within weeks exhausted troops were rotating to the rear for R&R. Going into town, eating at French restaurants. Finding amore. 
Then went back to the front.
Ukraine has to get more offensive capability. It’s wrong for the West to only make them strong enough to make small gains. People are dying and their land was just annexed by the bastard Russians.