Bank fees have risen sharply in recent years in the low or negative interest rate environment. Controlling investment fees (management fees, custody fees and transaction fees in particular) can be astronomical.
According to the Boglehead philosophy, a mechanical plan must be developed and implemented. For the overwhelming majority of investors, I am convinced that this is the best possible approach: it is possible to contain overconfidence or avoid damaging behavior in the event of temporary market irrationality.
The success of Robinhood is simple: It is hidden commissions under the guise of free services to investors. The company sells client orders to market makers (who actually use them for profit) and financial service providers.