And it'd be so easy to recreate that simple job and create an action to make it easy to reproduce that the internet is awash with plugins / actions to do this....
The truth is closer to this:
You can manipulate a JPEG to get pretty close to a correct WB adjustment most of the time.
It really isn't a winning argument

We can already batch WB hundreds of shots in seconds to give us great results, with tools we already posess.
Please tell me what the benefit is of ignoring what works in order to use something else that might work almost as well. Other than to score points in an argument