The standard utilitarian argument for pursuing knowledge

So why should we seek additional knowledge is we can't use it to make ourselves happier? Surely we should live in a state of blissful ignorance as much as possible.

Because I'm not utilitarian. I'll care about being happy to whatever extent I damn well please. Which is "a fair bit but it is not the most important thing".

"The opposite of happiness is not sadness, but boredom." --Tim Ferris.