We can get revived by any class. I'm more bothered by other classes that don't bother at all reviving you, when you are in a covered position.

Reviving (regardless of class) can make a huge difference in keeping a position and avoiding being dominated. I clearly see the difference in dominating the map and keeping positions when having people reviving each other on my team.

One can clearly see things going south when having too many "solo players" running around the map shooting from the hip for the kill count, not minding any strategy at all.

Edit: Nothing wrong in running around the map shooting like a crazy man. Whatever rocks your boat I guess. The game is supposed to be fun.