Yes, number of guns and shells doesn't matter if you can't bring them to bear on an enemy that is outmaneuvering you. But the Ukies aren't maneuvering. The reason they got slaughtered in Bakhmut is because they dug in in Bakhmut making them the target of the vast overmatch in artillery.
This was the NATO strategy for Ukraine. We misunderestimated Russia's ability to blow up half a continent conventionally. We misunderestimated wrong and Russia reduced Bakhmut to rubble as everyone admits.
Whatever side you stand on in this issue, the fact of the matter is we are broke and cannot continue to fund this nonsense.
The Ukies arent maneuvering, but they are interdicting. They are more and more able to do that. WWI style gun lines and vast ammo dumps are vulnerable to things like HIMARS.
The Russians can’t keep up their bombardments if they can’t concentrate their assets closer than 15km from the front, and right now it seems that their ammo dumps are stuck 40-50km away. They can’t feed their guns very fast. When the Ukes get the GLSDB it’s going to get much worse.
Russia is running low on artillery and ammo besides.