Earlier quoted context omitted.
As you so sarcastically point out, Americans give up many employment rights such as these. But it's not a one-way street. Being easier to fire makes American employees easier to hire, which is at least in part responsible for much higher pay in the USA compared to employee havens such as Europe. Furthermore, Americans tend to pay less tax. This isn't usually thought of as an employee rights issue, but in my mind, kee…
I think there's a middle ground between 'at-will employment capitalist hellscape' America and 'unable to be fired for months socialist hellscape' Europe.
Those making less than a certain amount can only be terminated:
a) immediately for cause (theft/fraud/etc)
b) with notice for poor performance
c) with notice and a legislated payout for redundancy where the job is no longer required.
Those earning above a certain amount need to negotiate any/all of these into their contract.
Admittedly it does occasionally result in employees being reinstated whose sacking was (IMO) completely justified. I don't like those specific instances, but I figure it's the price you have to pay for a system that is tilted slightly in favour of employees.
[0] The actual laws are rubbish though, they're intentionally obtuse/vague owing to industrial relations being a political minefield and no government wanting to touch it for fear of voter pushback.