The Russian approach to warfare has characteristically been shaped around large numbers; therefore, most of their weapon systems dispense with the finer points like high precision in favor of large numbers. The MLRS (multiple launch rocket system ) in this video is an extension of the older cold war Katyusha rockets – dispense with elaborate guidance systems and other electronics and make up for it with sheer numbers. You may agree with or disagree with the approach but they seem to think its effective.