You're right about "ignorance is bliss, knowledge is pain." What about the ignorant keeps them doing what they're doing? It's bliss. They're having fun not knowing what the consequence of their actions will be, so they continue on with their fun. Knowledge can be pain, or it can be the fix for pain. For me a lot of knowledge I have gained has made me happier and love life more, but at the same time some knowledge has made me feel lots of pain. I mean lots.

Edit: Since we're talking about bliss, I'd like to address my name. Botanical Bliss. I made that my name because I just thought it sounded nice, and sometimes I do feel like I'm experiencing profound bliss thru botanicals. That's not to say that bliss is ignorance  Experiences of botanical bliss have taught me some great things, sometimes knowledge that is painful, but knowledge nontheless