Why is limited control over data transformations a drawback for Power BI consultants?

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While Power BI’s Power Query offers powerful data transformation features, it lacks the advanced functionality found in dedicated ETL tools like Informatica or Talend. Power Query works well for straightforward data prep, but consultants working on intricate transformations may hit its limitations. For example, Power BI struggles with unstructured data or when handling highly specific transformation rules. Power BI consultant must rely on external tools to preprocess data before feeding it into Power BI, adding extra steps to the workflow. These limitations can increase development time and make Power BI less efficient for projects requiring complex data processing.