Honestly, that's really not that important for what I was saying, because we're talking about the Fed. The Federal Reserve can choose to fight inflation or it can choose to inflate assets, and that lies on a spectrum. The "why" of inflation isn't nearly as important as the severity of it. If inflation is at 10% you're not going to debate it before doing something about it - that just allows the situation to fester instead of taking initiative. The reason we're in this situation where inflation is still getting worse, a year after being told not to worry about it, is because it's politically untenable to actually try to fix the problem. Meanwhile inflation continues to worsen while we make symbolic gestures about fighting it.
Yes, understanding what's causing inflation matters. I'm not saying it doesn't. But when you have a crisis, you want to focus on mitigation first and then root causing it after the situation is averted.
Also you mention two possible causes of inflation. Limited resources and distribution, and companies deciding to raise prices because they can. What about the Fed printing money like crazy, flooding the M2 money supply? That's the one that's relevant to this conversation.