Therefore they need less protection/benefits for the case that they were fired, that being impossible.
Nowadays they can ask for a 3-year pause (e.g. to create a startup, etc.) but those plans come from the “flexible economy” and were introduced only recently.
It's like a startup who offers high stock options vested over a period for early employees. They grow too quickly and try to push the early employees out without triggering a clause that allows them to take back the options if they quit. They try to place them in jobs they are over qualified or not suited for.
Would you quit and leave money on the table.
As consequence very few people hire for these positions as well.
Employees in the private sector can receive significant severance pay, which provides a financial cushion while they look for a new job. Civil service contracts don't have that perk, so France Télécom employees were reluctant to quit.
A radical negative change in the working environment combined with no safety net seems like a recipe for depression. Maybe these people were ill prepared for the upheaval and had no idea how to cope with it.
From 1990 to 2017, U.S. GDP per capita is up from $36,500 to $54,200, about 50%. France is up from $29,500 to $38,600, about 30%. The forecast for 2021 has France at $41,100 and the U.S. at $60,100: https://tradingeconomics.com/forecast/gdp-per-capita-ppp?con.... That means in 30 years, Americans will have gone from being modestly richer than the French (24%) to being quite a bit richer than the French (50%). To put that into perspective, the 50% gap from France to the U.S. is the same as the gap from Turkey to France.
Worker protections make sense, but it seems that too many and you're locking people into an illusion.