From a logical perspective, your argument is invalid.
Here, let's look at this:
There is truth in how you say this. Your underlying premise however is that this is illogical. ime, the gut feelings of like / dislike require time to interpret well, but generally correspond to a very elegant internal logical framework. Fi is a rational function after all; as rational in nature as Ti. You lack the cognitive framework to appreciate the depth of this, but it will work best if you understand Fi doms are looking for as much cohesivness in a value-based structure as you are through Ti. We too are looking for the one simple equation that explains it all.
You sound quite young. Your friends therefore are primarily also young. Everyone is just figuring this out as they go along. Young Fi doms cannot express their internal feeling framework well into words. What's inside is like a masterful painting, and the words used to describe that are like finger-painting by a 5 year old. Fi has Te to express itself, after all. You will only see the crudeness of inferior Te, rather than direct expression from the dominant function. It takes time for Fi to find words to put to these feelings-based value concepts. And, it takes time, years of time, to realize that some of the things that feel somewhat objective as a youth have more shades of grey than initially realized.
This is part of the journey we are all on. So, having patience for each other is paramount. I have no problem with your rant, and no need to convince you of a position, so that's the primary reason why you're not going to have a bunch of Fi doms in here trying to appease your aux Ti.
And welcome to the forum new person. Nice to have you.