I would say that you are wrong here. Although I get what you are trying to say but just look at it from a different perspective.
According to me, every person who has a stable income, can be low, but still stable, then he can make use of DCA strategy to his benefit.
For example: If a person is earning $500 a month, even if he saves $100 then he can start investing with that amount or even half of that.
The catch is that he will have to regularly invest that amount so that he can leverage DCA.
Regular and consistent purchases, even in small amounts, can indeed be done and are also profitable. The condition is perseverance to stay on the path and do it in the long run, and what becomes more important is to allocate a safe amount. It will help to manage the investment so that it remains protected until the desired target is achieved.
It would be better to distinguish between savings and investments. Manage our finances well first, and then we will see a safe amount for us to allocate to investments with DCA.