The last sentence is particularly true: lots of important things are being said in French among French-speaking people.
Spoken French is also quite complex because it makes use of many references (usually shared by people of similar age) and relies a lot on second degree (what you hear is not what is meant). This is probably the most complicated part.
My wife learnt to speak French and she initially had issues to understand people nt because she was lacking words but because what she was hearing did not make a lot of sense. It is because it was either a reference or (less common because people knew she was not a native speaker) second degree).
Finally we decide in France to make our own life difficult by reinventing a lot of technical computer-oriented words, but this is the same in German.