We are now experiencing the tradeoff between efficiency and redundancy. The supply chains have been tuned for many years to be as efficient as possible to drive prices down (and still make a profit). The result is absolute minimum slack or excess capacity. This is (in computer architectural terms) a tightly coupled system. It is vulnerable to any of its parts having problems.
TP is one thing, food is another. And we have farmers plowing under produce and dumping milk because the next link in their chain is stopped while grocery stores are limiting purchases because the stores can't get stuff from their suppliers. And it's not easy or perhaps possible to just switch. As
@James_Dean explained, he's got an egg farm that is set up to product tens of thousands of gallons of liquid eggs a day. But not set up to produce cartons of eggs the way a consumer store would sell them.
The supply chain is going to get more messed up before it gets better. I'm not advocating hoarding of staples-it's selfish. But be aware you may have to substitute and make do...