We used to have this. It was called OLE Automation.

yep, and applescript...

i'm really not sure companies will allow their apps to be automated so easily, and the reason is api abuse (think of a saas where you can upload file attachments for example); you'd either end up banned or throttled pretty fast, and in the end the company will be like "cost > opportunity" and just close it off (and its like this already, llms just make this worse)