Look at Stardew Valley. One person (Eric Barone aka ConcernedApe) designed the game, wrote all the code (including the engine from scratch), designed all of the characters from concept sketches to final in-game art, wrote all the story and dialogue, created all of the sound effects, composed and recorded all the music with an original soundtrack of over one hundred pieces of music.

The game has since sold more than 20 million copies and some publications have called it the greatest game of all time. An indie game by one person!

Generalists absolutely can succeed today!