The problem Django solves is popular, which is why we have so many great frameworks that shorten the implementation time (I use Laravel for that). Just like game engines or GUI libraries, assuming you understand the core concepts of the domain. And if the tool was very popular and the LLMs have loads of data to train on, there may be a small productivity tick by finding common patterns (small because if the patterns are common enough, you ought to find a library/plugin for it).

Bad tools often falls in three categories. Too simple, too complex, or unsuitable. For the last two, you'd better switch but there's the human element of sunken costs.