Why are you ignoring the fact that grabbing data from heterogeneous sources, combining it and presenting it is generally never a trivial task? This is exactly what LLMs are good for.
If you are using an LLM to create an application to grab data from heterogeneous sources, combine it and present it, that is much better, but could also basically be the excel spreadsheet they are describing.
And why do you diminish the skill of good data wrangling as if it weren’t the most valuable skill in the vast majority of computer programming jobs? Your cynicism doesn’t correspond with the current ground truth in LLM usage.