BrokerageLink: The lesser known feature in most Fidelity 401(k)s (shivpatel.io)

While it is possible, most people don't have the time or interest to dedicate towards active portfolio management. Rebalancing index funds are the best option for >90% of retail investors.

Some of the best portfolio performance occurs in ones that are forgotten about. They sit there and grow over decades time without any poking.