If your developer labor force is interchangeable (you can fire or replace someone easily) then you don't have to care about DX. If your labor force is not so interchangeable, don't copy the practices of places where that is the case.
In product-speak, it makes it more likely your product is adopted broadly.
Microsoft used to understand this. Visual Studio, VS Code, and the Linux subsystem for Windows are some of the outcomes of this understanding.
(Also, notice that I didn't write "knowledgeable" or "development" or any other qualifier there.)