Advisors are good for you the same way that applying leeches to pull out evil spirits is good for you.
If you want higher returns, just increase your stock allocation but stick to the S&P 500 or a Total Market fund for your stocks. Telling an advisor you want to beat the market is a license for them to churn your account chasing shiny objects, leaving them smiling and you in ruin.
Jack Bogle, the late CEO of Vanguard, said something like "I don't know anyone that could consistently beat the market, in fact I don't know anyone that knows anyone that could do it".
If Vanguard's CEO didn't know anyone that knew anyone that could beat the market, neither you nor some random retail advisor will be able to do it, except by taking big chances and having wild luck.
As others noted, advisor fees and fund fees get sucked out of your account rain or shine. If we are unlucky and have future market returns like, say, 1966, then the allowable portfolio draw will be 4%/year or less. Your advisor will take about 1% AUM plus will usually put you in funds with additional costs. Overall, their revenue targets are to grab 1.5-2%/year. Leaving you only 2-2.5% to live on. Who would want to give away so much?
If you get lured by slick performance comparison graphs an advisor shows, know that they will be intentionally misleading. Some common tricks:
-They will compare their portfolio to a less risky benchmark (often one they dreamed up) to claim superiority
-Their comparison will often omit dividends from index funds but not their own
-They like to cherry pick start dates where their investment choices shown brightly for a moment (but their investment choices were made after the fact, so they had the answers to the test)
-Index investing is very tax friendly compared to active investing, but they don't mention that.
-They often even omit their own fees from the comparison.
But there is no point in even letting them show you a comparison, it's all just a magic trick. They would like to get you into a mental pretzel where if can't figure out the trick, they want you to believe it must be real magic.