Several reasons.

1. It's not even AI. It's machine-learning based word predictor. Which gets us to:
2. It's an absolute example of corporate bullshit made to:
3. Throw money back and forth in an economy, making it look like it's healthy and booming, while:
4. Actually tanking the economy,
5. Making governments sacrifice everything for "AI dominance",
6. Making management lay off thousands of people under the premise of "automatization", while really it just increases the workload on the rest, all while:
7. Guzzling tons of water,
8. Electricity,
9. Raw materials,
10. Producing never-before-seen amounts of e-waste,
11. And leaving residents endangered
12. All to generate unreliable results
13. That take tons of human labor to correct
14. While making others believe the batshit output
15. And destroying critical and independent thinking.

But yes, you can get some text output or a quick image draft.