I have never heard of any of those settlements apart from Avdiivka
They are small villages, but much more in aggregate than 10,000.
How the hell are your rust bucket tanks and dipsomaniac soldiers going to reach the Dnepr
The area we are currently doing most of the fighting in - the Avdeevka direction - is very densely populated. The entire area is known as the Donetsk Urban Agglomeration. One settlement begins, where the previous one ends.
Some of these towns were suburbs of Donetsk, where people kept their summer houses and gardens. Others were made up of workers of nearby coal mining and metallurgical concerns.
This is why the fighting in the East seems like it is constantly urban.
However, after approx. Mirnograd (we are about 12-15 km away now) the towns stop, and the wild fields begin. In these fields there are no fortifications... no place to hide. These fields extend all the way to the Dnieper, leading to huge cities like Zaporozhye and Dnepropetrovsk.
The first 2.5 years of this war, have been mainly focused with grinding through that extremely dense patch of settlement surrounding the city of Donetsk. The Ukrainians had ten years to fortify these areas, and used them to strike Donetsk.