Check the unemployment rates of young people. They're a lot higher in the countries with more protection.
But being unemployed is a much bigger problem for people living the countries without more protection.
So which is better?
Is it better if everyone has enough land to grow their own food, or that everyone has enough to eat, even though some don't have any land at all?
Unemployment isn't a problem, until your lack of protections makes it a problem.
You keep making the mistake of focusing entirely on the worker with no regard for the system they are part of.
When people don't enter the labor force the burden of supporting them transfers to others. This raises taxes and thus lowers everybody's standard of living. Push it far enough and your system will collapse.
Taxes support services and facilities that every society needs. I am no longer in the labor force, yet I still pay taxes. As I should do as I benefit from a well maintained system of highways, streets and roads, a functioning police and fire department, functioning hospitals and schools and a functioning system of government from local through federal level. Not to mention education, health care, health and safety, etc. For starters. I benefit from a well educated population, not just the part that is in the workforce. So do you.