Keep in mind that there is a form of mastery that cones with it, mal.
It takes time to tame the wild beast that is Fi. That means that it starts out as raw emotional information which a person responds to in sheer gut reaction. Over the years however, you learn to process that information and put it to use.
But that means that you have to learn to analyse, balance out, utilise and execute different emotional states in a different range of scenarios(Se/Ne context).
You may encounter someone who is NFP who has strong political opinions and values but who hasnt applied that same value at home with their roommates yet.
It doesnt mean that they dont believe in that value or ser its worth. It may well be that they havent gotten to that level yet( i dunno about others but for me this shit trickles down. Its easier to start at a big abstract level with a vslue and see/testvits impact than it is to apply it on a small practical scale in my own life - i suspect its the other way around for sfps).
So that means, they might not be aware of the possible application in their life in that particluar spot yet, or that they are aware but are still working out the kinks on actually applying those values in that sphere of influence, which may be made difficult by other emotional triggers that are still being sorted, for example.
For me, for instance, i tend to take a very strong stance on not harming others and free will, yet there are several instances in my life where i dont bother to adhere to that rule when it comes to myself. Yet the rule wad borne out of a desire to not be harmed myself and to not feel the pain of others when they get harmed. Ironically, im still not able to fully implement that rule for myself because i was taught 'not to be silly' when i was in pain. That means that now, it is extra hard work to be consideratw of myself and an ingrained habit to just gloss over it when im too stressed and tired elsewhere to put in that effort.
That is something im actively trying to undo now. Yet that value has been with me for 20+ years. It just was that massive of a project to internally align with it and work out all the kinks.
I think it's that part that ironically drives especially Ti users nuts sometimes and looks like inconsistency and hypocricy. You can hold a value as Truth while falling short of it and striving to model your life after it (and finetuning it)
Think of it as a blueprint by an architect. While that part is pretty mich clear and finished, The house itself is still being brought up to code, but meanwhile we still have to go on with our lives and ise the half finished stuff we have so far - to testdrive it and coz thats all we got for now