And this is why the 20th century was such a disaster. The Nazi's, Communists and most things cited as horrible over the last 100 years all could have been averted if the French didn't go wild over losing a sliver of land and destabilize the Bismarck system.France takes every loss like its global tragedy, if they suffered the kinds of losses Germany did in the 20th century, then they probably would have permanently collapsed.
Doubt France collapses though, just complains more and goes down the Germany path perhaps. Also tbd, France's losses in WWI per a percentage of population were on the level of Germany's, maybe higher. Same reason the Italians were so mad after WWI, it wasn't their losses were huge compared to the others but when you factor in their smaller population(Italy and France were the smallest great powers if we aren't counting the Ottomans) they were hit harder. Meanwhile Russia which did collapse had losses that weren't much larger than France's despite having over four times the number of people, the issue there was deeper than the manpower losses had more to do with conditions caused by the war.