I'll take 10 000 modern shells over 1m of whatever the fuck they were using back in ww1. The accuracy was "it's going to fall somewhere between us and were the canon is pointed" and up to 50% didn't detonate.

We're talking about:

https://nfknowledge.org/wp-content/uploads/2017/09/2573.jpg

vs

https://en.m.wikipedia.org/wiki/Bofors/Nexter_Bonus