Only against enemies with a certain squeamishness. The Ussr dealt with postWWII guerrillas in the Ukraine and the Baltic States, but at the cost of killing or deporting perhaps a third of the population.
This is true, but people get fed up with evil empires.
The problem here is that they didn't break the line.
Without the shocktroops, the line would have
never been broken.
How far did the removal of the best troops from ordinary units and the high death rate among shock troops lower the quality of the ordinary units?
You mustn't know too much about WWI history to make these claims
WWI was a paradigm shift in warfare, where new technologies far surpaced old tactics. For instance, rifles held far more bullets than muskets, and had a range of a mile or more. The Germans implemented the first chain-fed machine guns. Artillery & ballistics had gone a long way since cannon balls.
It was quickly discovered that if a defending army dug trenches, they were practically invulnerable to attack. With snipers, artillery and grunts with rifles for defense, and no armor to take the trench, it was extremely costly to directly assault the trench.
The only thing for the opposing army to do would be dig their own trench.
Of course, the generals and whoever wanted to gain territory, so they'd blow their whistle, and then all the grunts, with their CO behind them, would jump up and over the trench wall, to get gun downed by snipers, machineguns, and artillery.
The Brits wen 'up and over' at the First Battle of Yrpes until more than 50,000 British troops were dead.
Bill Slim certainly thought that it was better not to create elite units and that normal units, properly trained could do the same job.
I don't know who your Bill Slim is, but perhaps he should propose his idea to the Pentagon? I mean, why do we need artillery, airplanes, or tanks or any specialized group of soldiers?
In a perfect militarized world, everyone and everything would be top notch and thoroughly trained. Unfortunately, their are only so many available resources to train troop with, so training small elite groups to match up with grunt offensives is far cheaper than training everyone as elite.