[piqufoh]

In many non-US countries once hired there are employment rights. You cannot simply "kick them out if they dont fit ur needs". Isn't it preferable and less stressful for everyone if you can find the right person without having to hire and fire others first?

[sarchertech]

Most countries have probationary periods before most of those rights kick in.

[pjmlp]

Depending on the European country, there is a probation period between 3 to 6 months, where any of the parties can cancel the relationship at any time, usually 1 week notice, unless it is really bad.

That should be more than enough to assess if someone is fit for the job.

[hollerith]

How does an employer distinguish a worker who is trying hard only because he is on probation from a worker who will continue to try hard after the probation period ends?

[piva00]

In many non-US countries there is also a probation period before full employment rights kick in, allowing employers to fire new hires without reason, so definitely you can "kick them out if they don't fit your needs" in many countries.