[sofixa]

> In the more western culture of recognising that company loyalty is severed both ways, a probationary period makes much less sense.

American, not Western. Probationary periods are the norm in Western(or developed for that matter) countries, same as worker rights (such as you can't be fired on a whim). Due to said worker protections, a probationary period gives the company some time to realise it made a mistake in hiring, because afterwards it's drastically harder to let someone go. Same goes for the employee, during the probationary period you can leave with little to no notice, but once it's over the mandatory notice is in the multiple weeks to months period (at my last job it was the max for France, 3 months).