is data modeling optional for analysts
in Excel maybe you can get away with it, flat tables, some VLOOKUPs, a pivot table or two, and whatever comes out is at least predictably wrong in ways you can usually trace
but the moment you move to Power BI that stops working and i think a lot of people don't realize it until something breaks in a way they can't explain, because Power BI isn't just a visualization tool sitting on top of your data, the whole thing is built around a model, relationships, filter context, how tables talk to each other, and all of that directly affects your numbers in ways that aren't obvious if you're just dragging fields into a visual and hoping for the best
i've seen analysts produce completely different results from identical source data just because the relationships were set up differently, and the scary part is it doesn't always look wrong, the numbers come out, they're plausible, nobody questions them, and then three months later something doesn't add up and you spend a week figuring out it was a many-to-many relationship that nobody noticed
so this idea that analysts don't need to understand modeling feels genuinely disconnected from how Power BI actually works, you don't have to build the model from scratch but you have to understand what it's doing otherwise you're not doing analysis, you're just moving numbers around and hoping the model underneath agrees with you
curious how others see this, especially people who came from Excel and had to adjust