Being happy can sometimes be hard. You can't force happiness. Happy Paul doesn't think happy is about unadulterated joy or smiling from ear to ear (though they have nothing against that). They think it's about you looking after you and spending a little bit of time on you.
They hope to make products that bring a smile to you, because they know how potent a smile can be. They can't promise to make you happy but they can care and will try.