On January 1 1997, the S&P500 was $773.
During the same time, bonds sold off too. Everything did.
If you were dollar cost averaging into the market for 12 years, you could find yourself below where you started. That's a pretty demoralizing situation.
I think being aware of market conditions and reallocating as you see fit is just part of being a responsible adult. Maybe sometimes you do want to hold VTI, but also it's not unreasonable to bet on Elon.
I'm not saying everyone has to be highly leveraged and aggressive, but I think you're putting a tremendous amount of faith in the markets and intentionally looking the other way.