Did I ever say the ammo issue was a military issue? It is a problem for the civilian shooter as some commercial ammo regularly available in stores can destroy one of these rifles if fired in it. Just like how M1Garands need M2 pressure .30-06 or you can't shoot higher pressure .45-70 out of a trapdoor springfield.
I also wouldn't say it wasn't a design problem for the double feed as they did switch to using pointed ammo in the rifles in service and encountered the problem in service. Much like how the Lebel rifles suffered from a similar problem (resulting in the ring around the brass base to catch the tip). They were just willing to accept the risk a lot more than most would be today. There is a reason they designed out that issue from most service rifles.