Earlier quoted context omitted.
If the shortage of consumer form-factor toilet paper wasn't in the supply chain, where was it?
I don't like "gotcha" style discussions, but I admit I could have worded that more precisely. What I meant is: There was no reduction in overall toilet paper production, and people didn't suddenly start to shit more. The shortage was mostly a distribution/packaging issue in the form of "not available in packaging X at location Y". Markets tend to solve that kind of problem incredibly quickly.
Consumer form factor toilet paper is still being rationed for me right now (in Cambridge, MA-max 1). That's a year after the start of this.