Everytime I have had the infinite happiness to be in the french countryside with a beautiful woman during summertime, I really not have missed the boursin... :)
As to the bread, it is important to remind that the bread this commercial propaganda is refering to, was produced, one generation before, with sane wheat which didn't need nanifiers to grow and which had benefit the nutritient of healthy soils.
In many areas of France clean water was not always easy to get, so wine, cider and beers were also ways to have a drink without pathogene bacterias. In the Lot, on the Causse(limestone plateau (in south-central France)), during summer, when water was scarse, men used wine to shave in order to save water...
The vignobles one can see nowadays are far more widespread than in the old time, when vineyards were mainly for self reliance.
The French really became alcoolics on grand scale because of the traumas caused by the wars. During WW1, the army gave 2 liters a day and one pack of cigarettes called "troupe" to the... troops, so you can guess that they wouldn't stop habits acquired in such traumatic conditions that they had on the frontline.