What's with the serious side effects?

A couple weeks ago I saw an advertisement for an RA drug whose side effects included nausea, skin rash, and tuberculosis.

Then this morning, I see a commercial for Humira, which can also cause hepatitis. Only thing is, Humira is a drug for psoriasis!

Well, apparently Humira is simply a wonder drug, which can treat Rheumatoid Arthritis, Psoriasis, Crohn's Disease, and Ankylosing Spondylitis. (What the hell is Anyklosing Spondylitis???). Unfortunately, this wonder drug can cause:

Tuberculosis
Hepatitis
Skin Rash
Lupus-like syndrome
Certain types of CANCER

Now, I know some people with RA, the risk might be worth it, that's a horrible disease. I know someone with Crohn's, and having gone through something similar, the risks might be worth it.

But psoriasis? I know its unsightly, and painful, but is it really worth the risk of TB, Hep, Lupus or Cancer? (not to mention the "skin rash" would be a very funny side effect to get...)

And finally, my favorite disclaimer from the website:

"These are not all the side effects with HUMIRA. Ask your doctor or pharmacist for more information."