Please abstain from easy generalisations.
The acute observer will have noted that the strike is called for a Tuesday.
Unusual, since a good strike should be either on Mondays, Fridays or Wednesdays. (extended weekend or perfect week split)
Conclusion: it is politically motivated, as in "high party politics", not as in "asking for better pay, more jobs".
Proof: it is called by the communists and (hardline) socialist unions.
Every participant is promised a small flag (rouge oblige), a fancy carton trumpet, a plastic cup of warm wine with lemon, and a hot dog with a democratic choice of ketchup or mustard.
The casual tourist could be confused thinking it is the Liverpool D gate fan club marching on a quiet day.
Expect some public services to be moderately disrupted as well as some big enterprises (Renault et al).
The big chess game in the run to the elections starts now !