There is a chance that the equity premium is due to some risk that is priced in by the market, but one that hasn't happened in 100 years. A long duration war, a pandemic without a vaccine, AI driven game changes etc. So betting on it not happening is a personal choice/bet.
Alternatively, the premium is just due to people not liking market fluctuations and buy and holders can buy fluctuating assets at a discount and hold them through turbulence earning a premium. In that case the risk is that the premium might disappear down the line if investing practice changes, we all start using 'MoneyGPT', or other financial innovations to smooth returns become popular.
History tends to repeat, but we live in very interesting times and I'm not sure anyone knows how AI and financial innovation is going to impact on market dynamics over the next 10 or 20 years. For me, it's risk driving that return and the risk is that you don't maintain your investment goal within the desired timeframe (to quote Keynes 'in the long run we are all dead'). Also, in the case of retirement you might not be dead but you also could have a lot less opportunities to spend money as time goes by, so the consumption is front loaded.