I'm also similarly puzzled why the Russians can't seem hold a defensive line in Lyman zone. Are they really that lacking in manpower locally? What happened to the 1st Guard Tank army? Where is the rest of the Russian army / Donbass militia? Why aren't more forces being committed to the defense. Is there really an insane plan to draw Ukrainians in?
Nobody knows for now if the Russian military planners are simply genius, insane or just struggling to work with what they have. If you use Occam's Razor, then it's probably the 3rd point. But if you like 10d chess, then its the 1st or 2nd.
We will know soon in Lyman.
Russians has to make a priority list, considering the lack of manpower.
They don't have enought resources to protect the full frontline.
It looks like now they allocated the resources to defend kherson and the seaside areas.
These having the highest strategical importance, the logistic line is the longest, and if they loose it then it will take lot of time to recapture.
The areas defende thinly and give up are the ones closest to Russia, with the shortest supply routes, and from strategical standpoint the least important ones.
Easy to loose, easy to get.
The NATO forces tried to crack Kherson, but failed to do so, all of the noise that they make in north is just to force Russia to weaken the defense of Kherson and the coastal areas, by removing units from there to protect strategically unimportant areas. Additionaly any unit that travel west to east will strugle to go back to original position if there is a concentrated push at the coast.
In North they have light NATO units, in south they have heavy units. Russia blown up dams in Kherson, and pushing hard there .