Cities like Elektro and Cherno are not very exposed. I spend quite a lot of time in Elektro (or occasionaly Cherno) whether tracking down players (or snipers) or searching for loot. I have been killed by a sniper once. I was killed because i made a bad decision. If you move quickly between building, loosing cover only when absolutely necessary, don't make obvious mistakes (like going in the open just after shooting a few Z's) you will rarely (if ever) get killed by a sniper in Cherno and Elektro. You are much more likely to get killed by a player with a lee enfield or an ak instead.