In other words, they were trying to avoid bad press and having the population immediately perceive them as being indiscriminate or blowing up their entire country etc. There would just be so many videos on TV and the internet of so many bombs and missiles.
Its actually kind of like the discussion about LIDAR on Teslas. People always come up with these supposed scientific reasons that they decided not to use it. But the biggest reason was, it doesn't look good, or fit in at all with the sleek design of Teslas. Teslas would go from the sexiest car to the dorkiest overnight.
Anyway, pretty rough analogy, but similarly, the Russians probably decided not to operate in the most effective way, deliberately, due to "optics".