Having said that, while everyone has Fi. Not all people are aware of Fi in process, or have a strong grasp/control on how Fi works within them. For me, statements that NF have strong inner values just means that NFs focus much more on their personal values, more so than other people. This is contrasted with a person, who while feeling one thing, has a certain value, dismisses it on the basis that it's just a feeling and therefore irrational.
All actions are irrational at it's core, or rational depending on whichever way you like to perceive things.