That's unless you buy the western rhetoric that they can push Russia back short term which just seems ridiculous given they are a smaller force and we know, pre NATO artillery, it was 15 to 1 in terms of long range artillery and whilst it might be closer now it's still nowhere near equal.
I don’t think the target is to match them in current Russian numbers. You can’t increase the UA artillery 15 fold. That would take a monumental effort from western militaries and significant Ukrainian manpower to train units knowledgeable enough to man and maintain them.
I think the target here is to increase numbers of course but mostly to tip the balance by providing more quality than quantity. And maybe by doubling UA artillery in the process, the ratio only changes from 15-to-1 to 8-to-1. But if their accuracy and range are superior they can shoot and scoot, shoot and scoot. Inflicting heavy losses, destroying morale and reducing the numerical advantage in the process. Meanwhile saboteurs work to destroy ammo depos and supply lines.