You might be on to something.. I do let my tank suffer through its issues believing that it makes it stronger in the endYeah, I'm not following any of your logic. Would you also not wear glasses if you needed them? I don't understand suffering (in your example, with a headache) needlessly. Taking aspirin, acetaminophen, ibuprofen, etc doesn't affect your immune system.
And no, antibiotics don't "suppress" the immune system, they kill the thing that's making you sick. Immunosuppressants are a whole different type of medication that is necessary for some who have autoimmune diseases, organ transplants, certain cancers, etc.