In war the air defence could simply choose to ignore them, civilian population can handle a few casualties in a short war. In a long war like in ukr now or like the war of attrition between Israel and Egypt after the 6 day war this has value to demoralise the civilian population and wreck the economy over months long bombing campaign. But this kind of thinking has never been with our military . A shahed like drone (GPS guided winged drone) can honestly just be outsourced to civilians if we find ourselves in a similar situation .That is what exploitation means, to let them waste, expose their positions and so on and divert their assets to protecting things that are less of priority for attacking side. There are only finite assets to play a war and each one is generally accounted to lead to max utilization towards a goal...OR is exactly this. So a cheap 10k drone is effective in doing this if done correctly and in timely way.
Russians get a lot more out of the lancet (which are actually useful) which has sensors and a comms unit which undoubtedly raised its cost.