FYI: You can get get a 50 lbs bag of pinto beans at Sams for $33 and a 50 lbs bag of rice for $17. They will keep as is at least a year and provide, respectively, 76,000 calories and 82,400 calories. Maybe 80 days worth of food for a single individual.
It would be a pretty monotonous diet but better than the alternative.
In this instance, a pandemic. There are many other scenarios where even if you have drinkable tap water under normal circumstances, disaster might render that useless.
I drink bottled/filtered only due to negative side effects (for me personally, most don’t have any) of drinking chlorinated water, so simply increasing my input buffer is really straightforward.
It would be a pretty monotonous diet but better than the alternative.