Bonds only give you certainty to the extent that inflation remains certain.
Stocks generally rise with inflation, whereas bonds continue paying out the same nominal amount, which buys you less over time.
As a retiree I'm 50/45/5 in stocks/bonds/cash, having opted for a conservative portfolio. The stocks are the only reason I haven't lost buying power. But the bonds have performed so poorly that I've barely kept up with inflation despite the amazing bull run in stocks.
Are we talking about bonds or government bonds here? The former will beat inflations assuming you don't just buy AAA rated ones. Investment grade perpetual bonds in US dollars yield over 6.5% on a Yield-to-call basis.
It depends on the goal / priority. In most financial / retirement advice they are focused on average middle class Americans. They tend to have too little savings, and not a lot of options.
If you have more than enough saved to meet your basic needs, it does (IMO) make sense to give up some total income for lower variance.
I sleep on certainty. I feel bad for the people based their futures entirely on a trajectory from a time we'll look back on as "utterly unsustainable".
Yes, you lose money (or more precisely you lose opportunity) but you gain certainty. Which is what you want for retirement
That’s pretty much the definition of risk premium.