> AI helps provide good analysis without having to cleaning up data manually.

I don't even know where to start. I suppose you don't really think that what separates ML/AI (whatever that means) from your standard OLS regression is that denoising is not done manually?

> Cleaning up data is very expensive. And without that, the analysis is good for nothing.

I hope you are not saying here that linear regression cannot handle noise.

In the end, as this blog post also points out, ML/AI is just a vague blanket term. What you want is a statistical method that captures the signal as fast and efficiently as possible and often the gain from going beyond simple linear models might be marginal.