You can pop out the anvil, pound the firing pin dimple flat, put in a cap from a roll of strip caps and reseat the anvil.
It does work. Its not match grade. I wouldn't use it for a high pressure rifle.
I experimented with this in the late 00s during that primer crisis. I was using Promo in 38spl and boosted loads of WC860 in the 45-70. I tried Promo in 30-30 with inconsistent results. I believe the low brisenance won't reliably light a cartridge with low case fill. Stepping up charges to something with higher fill meant changing to powders that were harder to ignite, low brisanence again being a problem. Boosting might have helped with this.
I still have rolls of strip cap put away from that era.
As some one else up thread said, I took that experience to heart and did my darned-est. Not to have to worry about primer shortages again. Id gotten complacent in the last few years and I'm a little short on small pistol and magnum small rifle for my high use stuff. But this time I'm at least well enough set that I'm not reduced to playing with strip caps and ammonpulver because I'm bored.
As someone else said, primers are the bottleneck. The machinery is expensive. Its a highly skilled craft. The C suite is very skiddish about sinking capital into a highly volatile market. If trump had won, covid ended in the next year, and the bacon lettuce mayo crowd chilled out...we would have been looking at a market crash in about mid to late 2022. Just like the mid-trump years. That's part of what killed the NRA, the leftist threat had been reduced and the money wasn't coming in.