My parents always used to make me feel guilty about calling in sick from school as a teenager, going so far as to insist that the house should be spotless by the time they got back from work because 'I had the day off anyway' or to shoot dirty looks if I wasn't completely bedridden and say things like “I guess you're not too sick to play videogames, huh?” Like, no, I'm not at death's door here, but you can see I'm coughing and sneezing and running a fever and feel like garbage, and this happens to be less strenuous and more enjoyable than going to school.
It always sucked to catch the insinuation that I was just faking it or playing up the symptoms to get some time off, as if rest was some forbidden fruit reserved only for the most dire emergencies, especially when the shoe was on the other foot and they took a day off, I was expected to pick up the slack while they curled up with soaps or a novel because I wasn't the sick one.
I realize now that it mirrored their (and my own) experience in the workplace, that people would constantly just go to work sick and expect to power through it, infecting their coworkers in the process, because god forbid a little contagious disease stop you from being 110% productive always and forever, and the business is perpetually too short staffed for anyone to 'play hooky.' It's no justification, but it makes a lot more sense the way they treated the topic.