Then why has Ukraine not lowered the conscription age?
2. So what? 30-45 is where their population peaks; massive dip right in the 18-30 range: https://en.wikipedia.org/wiki/Demographics_of_Ukraine#/media...
2. The “so what” is that it’s pretty hard to argue that the war is an existential event if you are not drafting the portion of the population best able to make war (young men).
2. 25 is drafting young men; given where their shortages are there just isn't a benefit to reducing this to 18.
Usually you only go up the age-brackets when you are more and more desperate, for, you know, obvious reasons. Ukraine is doing it in reverse.
This is also why we've seen multiple headlines about Russia running out of stuff: they did run out of some things, then shifted to other stuff and ran out of that, then shifted to other stuff… — Ukraine has a shortage of both guns and young people right now.
Ukraine can certainly give up their now rump states of Donetsk/Lugansk plus Crimea if they were getting something like that in exchange. But until there is even a remote possibility for such security all they have is their terms of getting all their land back. If Ukraine now agreed to "peace" where they give up the land to stop the war then they would have to deal even further in order to gain enough security to prevent the next war from ever happening.