It's worth pointing out that:

1. Much of the core lesson in this article has nothing to do with Unity specifically, and applies to self-taught programmers in general; and

2. This person has a vested interest in making you believe learning Unity is especially difficult.

Yeah, the actual point is "For a long time I avoided learning programming and it turns out you do actually need that for a game programmer job."

The issue was compounded by the author getting a lot of positive feedback on their game, because people respond to how the game looks, not the code.

For the solo indie approach that's not really an issue (many such cases!), but getting a job is a separate beast.