There's no comparison between dealing with current cost of living expenses and a long term 401k. The only time someone really takes it in the shorts when playing the stock market (which a 401k is not) is when you buy high and the sock crashes, when you're doing short term investments. Long term investments that are years, much less decades old, aren't affected that dramatically by the highs and lows which come and go. Which you can expect plenty of in all the time you have until you reach 401k retirement.
While I'll agree that there is a difference between cost of living and a 401K, there is not when you are talking about cost of living and stocks -- even for some people who have long term investments. As an example, I'm retired and, despite having a "safe" portfolio (lots of "recession proof" stocks, bonds, etc) I still lost roughly 10% of my retirement account. Sure, with my long term stocks, it can be assumed (though not guaranteed) that in a few years) my retirement account will go back to what it was a month ago -- but I'll lose money and several years of time waiting for that to happen.
I'll also say that my baby sister heard a comment from a stock analyst, telling those who have stocks in their retirement plan something similar to what you are saying, with a caveat -- he said it isn't an issue if you are more than 5 years away from retiring, that in the next 5 years that the market should go back up and their retirement fund will be back to what it was. Of course, that doesn't help my sister, who plans to retire in the next 5 years.
The issue with your thinking is that you are not realizing that there are millions of Americans who are affected today, they are already living (or will be in the next few years) on those accounts, so that any loss is a loss in the income they are living off of. Worse, those losses look as if they are soon to be multiplied by inflation -- as the high number of goods we have been importing from China are "taxed" by 145% (and that could easily still go higher), with no good short term replacement for those goods.
We'll see what happens the rest of the year but, from how things look at the moment, this could be a very rough year for Senior Citizens.