That sounds like the story that someone running a mutual fund would tell. Statistically, mutual fund managers underperform the index in good years and in bad years, which is kind of crazy given that they're supposedly spending tons of time (and your money) so that they can do better than someone just randomly picking stocks. Nowadays, the only people recommending mutual funds instead of index ETFs are people making a commission on selling you mutual funds.
Inflows to mutual funds fell behind ETFs 10 years ago. Nowadays, mutual funds lose money each year because it's so well documented that actively managed mutual funds underperform much cheaper index funds. Every year, we heard some famous mutual fund manager say, "I know mutual funds have been losers for the past couple decades, but this next decade is going to be different..." Honestly, I'm surprised that there's still so much money in actively managed funds.