That's true in general, but people do use these hobbyist boards as an alternative to a manufacturer dev board when prototyping an actual product.

It's reasonably common in the home automation space. A fair few low volume (but still commercial nevertheless) products are built around ESP32 chips now because they started with ESPHome or NodeMCU. The biggest energy provider in the UK (Octopus) even have a smart meter interface built on the ESP32.