Research shows that actively-managed funds beating comparable index funds is a matter of not many, not by much, & not for long.

Not many actively-managed funds beat comparable index funds over any particular time period. Usually fewer than 20% in a year. Even fewer for longer time periods.

The actively-managed funds that do win usually don't win by much. Those that lose usually lose by a lot more.

The actively-managed funds that do win usually don't win for long. The percentage of funds that wins in one time & then wins again in the next time period is about what would be expected based on random chance. So of the 20% or so that win one year, only about 20% will win again the next year. In other words, they probably won because of luck, not skill.

Standard & Poors published their Index vs. Active report and their Persistence report every 6 months; they document these points very consistently