First, learn marketing properly. Developers handle the most modern technology, but the fundamental nature of this profession is 'crafting'. It is difficult for someone with the attributes of an educator, a soldier, a civil servant, or a farmer to suddenly create the attributes of a 'merchant'. The same goes for developers, who have the attributes of an artisan.

There can be exceptions. If you come from a family with a long line of businessmen or merchants, you might be able to quickly awaken a dormant 'merchant' attribute. But that is a rare case. When we try to build a new feature we didn't have before, we have to go through a massive amount of trial and error. You must treat marketing as exactly that—a missing feature in yourself that requires a massive investment of time and effort to acquire.

For a developer equipped with this, the current era could be the time to escape through side projects. But if not, nothing will change.