It's not that Europeans embracing being idle. It's that they realized typical white collar workers hardly produce any value (unlike Americans who still pretend they do) so it makes no difference for them to work less than 40 hours per week.

Junior doctors across Europe reported working an average of 57 ± 17 hours per week (216 ± 61 hours per month)[0].

[0]: https://www.juniordoctors.eu/assets/rest-report-DeLrwvob.pdf