Blue collar work isn't all sunshine and rainbows. Blue collar workers often have to pull forced overtime on weekends or weeks on end if the job needs it. I worked in a factory for the longest year of my life, and we had a rule in place that you could not be forced or voluntarily work more than 15 days in a row without a day off. And people regularly hit that limit of 15 days working 12 hours a day during busy season, sure they were getting paid overtime but it wears on you. And then if you ever need to switch jobs, you might end up on the bottom of the seniority totem pole and stuck on 2nd or 3rd shift on a non-traditional work week. We only shut down on 2 days of the year and that was Christmas day and Thanksgiving day for 24 hours.
Here in Germany, thanks to the agreements with the works council, there is no forced overtime without proper agreement and the respective compensation.
Naturally not every company has such agreements in place, but even then, you are free to search for help on work law.
Same applies to several other countries.
Of course, the extent that people seek for help, depends on how much they can afford for support, or the consequences at the current employer if they eventually win. But all in all, most European law tends to be on employees side.
