How is # of himars relevant to being mobilized??? Being mobilized in this case means that every able-bodied person and half the non-able who can carry rifles have been conscripted by the press gangs and hauled off to the Donbass to face off against the most dangerous military organization on the planet as cannon-fodder, and Russians have lots and lots and lots of cannons... They also have better multi-launch rocket systems than himars.
It’s relevant because the US Army has 500+ HIMARS and has given a literal handful to Ukraine so far. Thousands of Ukrainian soldiers are being trained in NATO countries now. Ukraine is just scratching the surface of its combat power while Russia has already failed in its goal of destroying Ukraine as a nation.
After six months of war all Russia can do now is destroy Ukrainian villages. Should Russia threaten to do any more than that an avalanche of military aid will flow to Ukraine. Time for you to accept Putin has lost. Kyiv is lost to Russia forever.