You don’t have to have a strong stomach if you don’t pay attention to the market. Buy and hold or “set and forget” are legitimately good strategies at least in part because of this reason.
Of course you also have to believe the theory of buy and hold is sound and likely to work in the future. I think that's another part of why I struggle with it.
I do think it's important to be aware of our emotions when it comes to money and investing. I've realized that I won't be comfortable enduring drawdowns much more than 20% and so I've found alternative strategies that let me sleep at night.
