I find that far too often. Jobs are really cheap about PTO and sick pay. I don't think anyone should ever have to feel ashamed for calling out of work when they're actually sick or are dealing with a difficult illness. The system is set up so that you feel a sense of shame or guilt whenever you call out of work and if you have no PTO or sick days to use, you're just giving yourself a strike by doing so until you no longer have a job.
I think the skimpiness of PTO and sick pay, especially in the entry level jobs is bananas. I worked at health insurance company that considered incidents and PTO the same using a PTO day counted as an incident and after 10 incidents you would be terminated.
I know people who work in the service industry as social workers, nurses, therapists etc. Etc. Who frequently run out of PTO or sick pay because the companies they work for simply don't offer a lot to start with.