A good example of cupping with a perfect alignment is my daily drive Eighth gen Civic. The rear has no camber adjustment so the insides of the tires cup. The only way to correct this issue it to buy adjustable control arms or a camber bolt kit(which is a waste of money I think). This car also has has all four shocks/struts replaced. However this is a different case as it’s a very well known issue with the Eighth gen Civics that are not K20 based(this is a non Si car)
In my case the tires being rotated every 5,000 stops any major cupping issues. In this case I think we are both in agreement that the replacement of the stock springs with performance ones as well as having the stock suspension may be the issue. It also could do with brand of tire etc. I have seen hard as rocks Michelin Defenders have no issues with cupping on a blown out suspension while Conti DWSs cup within 2,000 miles or less.