It's easier to care about your job when you're capable of doing a good job. But the average person nowadays is more likely to be dealing with obesity, hormonal imbalances or a variety of other modern ailments/vices that make it harder to think clearly or perform consistently.
And then social media gives us post after post about how your coworkers are not your family and how dumb you have to be to give 100% to your work. A lot of people seem to mindlessly prescribe to this train of thought that would otherwise have questioned it if they went to a church or had some belief system that emphasized the inherent importance of doing good work.