Maybe, depending on the definition of better. The single VTSAX fund has substantially outperformed the three-fund mix.
In my case, I believe we're in a rising rate environment, therefore I'd rather not hold bonds; I'm realistically investing for my kids' consumption rather than our own (we have the basics well-covered already); VTSAX holds companies that have substantial outside the US exposure and most of my future expenses are tightly tied to the fortunes of the US economy.
If your timeline is > 35 years, you're in the US, and intending to stay in the US, I could argue that pure VTSAX is better. Any of them are better than a "professional" financial advisor, IMO.
In my case, I believe we're in a rising rate environment, therefore I'd rather not hold bonds; I'm realistically investing for my kids' consumption rather than our own (we have the basics well-covered already); VTSAX holds companies that have substantial outside the US exposure and most of my future expenses are tightly tied to the fortunes of the US economy.
If your timeline is > 35 years, you're in the US, and intending to stay in the US, I could argue that pure VTSAX is better. Any of them are better than a "professional" financial advisor, IMO.