If you yourself are taking Humira, you should probably know that stuff.

This nice website firstly explains by which diseases the condition of being immunocompromised can be achieved

Then, you have basically the first sentence of the Wikipedia Page regarding that topic: Immunodeficiency, also known as immunocompromisation, is a state in which the immune system's ability to fight infectious diseases and cancer is compromised or entirely absent.

Then, you have a third source, that yet again refutes your points: Right here

If those sources aren't enough for you, there are even hospitals, solely determined to study the sciene that you don't even believe exists: Such as this one

And if you want to say "Well, it says that you become immunocompromised through other diseases", yes, that is true. However, you can also be immunocompromised on its own