PrSM has been in production for only a short time, and ATACMS stocks were never high. Neither of these are the backbone of US long-range precision strike weapons. Article is misleading.
Never high and a significant number were donated to ukraine specifically because a ground launched pgm has never been a high priority for the US since the USAF exists.
It IS an issue if stand-off war is your only war, and it seems to be the exclusive approach here. If you run out of long-range precision weapons, what do you have left? Boots on the ground? That's not going to happen, and that means you will never win this on and off war.