Because most likely another infection will be on the way shortly after unless you make adjustments. For example, my parents loved giving antibiotics. Every time I had diarrhea I would get a dose. Of course it was like my gut biome getting hiroshima'd. So sure enough, a few months later my weekend immune system would get sick again. Since learning about other options it's been about 20 years since I've taken antibiotics. I will take activated charcoal and encapsulated oregano oil. All good. I hardly get sick. No one working in a hospital would encourage this for fear of getting sued and it also makes you independent. Another example was that fevers were considered cures and allowed to run their course. Tylenol and such will stop them. But the fever never gets to finish its job and more disease will be on the way. Crazy high fevers might need western medicine intervention as something has gone awry. Thomas Cowan has a good book on vaccines and how the body normally would treat such things. Of course a westerner but not the standard methods practiced by the healthcare business. Think money. These people want money more than your wellbeing.