"The question is, doesn't Toulouse's achievement owe a great deal to Boeing's heavy lifting of aircraft manufacturing for several decades? Boeing did so much to create the industry which Airbus then arose to serve in some ways better than Boeing had served it and was serving it - correct?"
No, I wouldn't say a great deal. Airbus's success was built on the existing, not insignificant, aircraft industry of many European counties, to name Britain in particular, but also France and Germany as other examples. Some British aircraft manufacturing companies pre-date Boeing by several years.