When you tie pricing metrics to interest rates, they are either not inflated or not that inflated.
You have to account for the amount of money in the system and how that money seeks to beat inflation.
You can't just pick up 40-year old chart analysis books and say "aha the P/E ratio for this sector is higher than normal", it is all part of an ecosystem.
The macroeconomic policy is going to be a greater influence than any chart-based psychology proxy or seeing how many essential workers are talking about investing their spare change.
Right now, more money is going to be created or distributed in the trillions. If the Central Banks are instructed to be involved, or chose to be involved, their method of getting new money into the market will be by purchasing more bonds which pushes interest rates even lower.
The only thing this didn't predict were new ephemeral asset classes, crypto. That people are opting to buy.