I feel like with St. Anger they went for the nu metal grittiness of a Slipknot, but hey Korn are also quite big and they have a bit of an industrial touch almost, so let's make our album sound like Lars is beating oil drums in a factory, and also guitar solos aren't cool anymore because the current big metal bands aren't really doing them, so let's write 3 minute songs without solos but stretch them out to 7 minutes.
Couldn't have put it better myself.
This may be over simplifying the snare decision, but the biggest metal band (arguably) at the time, literally had a percussionist who played an oil drum. I feel St Anger was the first studio album they had ever recorded, where they were on the back foot. Load and Reload hadn't been received as well as the Black Album, and there was a new trend in metal that was selling, and they were not at the forefront of it at all. This may have been the first time where they attempted to follow a current trend (that they maybe didn't fully get), which lead to the questionable choices they made. I personally can't help but think those choices were ultimately coming from Lars.
I guess when St Anger bombed they essentially became a band that played it safe abd stuck to what they know works for them. But imagine being a band that went from strength to strength on each subsequent release, culminating in Black Album! They were the biggest metal band on the planet, still are, and they just probably felt they could do no wrong.
To be faced with the fact that you'd lost your edge somewhere along the way, and were not what the kids in the early 00s were listening to, must have been pretty sobering.
I've said for years, all I want from James Hetfield now is a solo album. That would excite me more than anything I think the band could release at this point.